Reverse MvM Beginners Guide: Difference between revisions

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Reverse MvM refers to a combination of [https://sigwiki.potatomvm.tf/index.php/WaveSchedule custom popfile keyvalues] that flips the teams and win conditions.  Instead of defending against hordes of robots, players are spawned on the blue team and must fight their way to the hatch and deliver the bomb.  Designing missions around this concept can be very complex and requires heavy usage of [https://sigwiki.potatomvm.tf/index.php/Design_PointTemplate_with_hammer_map_editor Point Templates].  It is highly recommended that you have a basic understanding of hammer and map logic beforehand, as well as a deep understanding of our [https://testing.potatomvm.tf/mvm_bigrock_sigdemo.pop popfile mods].  An example popfile for Rottenburg can be found [https://testing.potato.tf/tf/scripts/population/mvm_rottenburg_reverse_core_logic.pop here]
Reverse MvM is a combination of [https://sigwiki.potato.tf/index.php/WaveSchedule custom popfile keyvalues] that flips the teams and win conditions.  Instead of defending against hordes of robots, players are spawned on the blue team and must fight their way to the hatch and deliver the bomb.  Designing missions around this concept can be very complex and requires heavy usage of [https://steamcommunity.com/sharedfiles/filedetails/?id=2289315026 Point Templates].  It is highly recommended that you have a basic understanding of hammer and map logic beforehand, as well as a deep understanding of our [https://testing.potatomvm.tf/mvm_bigrock_sigdemo.pop popfile mods].   


== Maps ==
An example popfile for Rottenburg can be found [https://testing.potato.tf/tf/scripts/population/mvm_rottenburg_reverse_core_logic.pop here].
While the majority of existing mvm maps are suitable, longer and more complex maps are best suited for reverse.  Bigrock, Mannhattan, and Rottenburg are examples of valve maps where it is relatively easy to stop players from getting to the hatch quickly, due to their layouts and/or overall length.  Shorter and more open-ended maps such as Decoy, Mannworks, and Coaltown are still completely valid options, however they will require ample counter-measures to avoid players bypassing every threat and camping at the hatch, usually by blocking the hatch until the last subwave is ended, or blocking off large regions of the map from access and periodically opening them. 
=== Gate Maps ===
Maps with gates are very useful for structuring your waves at the cost of simplicity.  You can enable/disable bot spawns and connect your own custom logic to the outputs of the maps [https://developer.valvesoftware.com/wiki/Trigger_timer_door trigger_timer_door] entity using AddOutput, giving you the option to add rewards or enable new mission mechanics when capturing a gate.
 
=== <s>Engineer Teleporter Types</s> ===
''<s>There are 2 separate types of engineer teleporters: regular teleporter behavior, and engineer bot teleporter behavior. Engineer bot teleporters act as a new spawn point, and will instantly teleport players to an exit on respawn with no entrance required.  It is recommended to only use bot style teleporters in long maps that do not use gates, combining gates with this feature can cause balance problems as well as confusion for newer players.</s>''
 
<sup>As of 12/07/2021, The feature to place engineer-bot style teleporters is horribly broken.  Only vanilla teleporters and teleporters built by actual engineer-bots are currently functional.</sup>
 
== Placing Spawns ==
[[File:Rotten.png|thumb|Custom spawn and sub-wave layout example for Rottenburg.]]
Bot spawn timing and placement is the most important ingredient for making your mission enjoyable, and each spawn must be carefully and thoughtfully chosen to cover as much ground as possible before it becomes simply too far from the player to be useful. 
 
It is best to divide your map into distinct areas that players need to conquer before progressing to the next stage, placing spawns accordingly for where those sections of the map are.  Rottenburg, for example, could be cut into 3 distinct areas that players need to beat before deploying the bomb:  The front, the church tower/bridge, and the hatch.  Spawns can be placed and accompanying sub-waves can be timed based on how long you want players to spend in each individual area of the map.
 
A common mistake new reverse mission makers will make is placing spawns very close to the player, sometimes in plain view, in order to ensure players don't make too much progress too quickly, then, waiting for all bots to be dead in the previous sub-wave before spawning the next.  It is best to avoid this practice and, instead, place your spawns far behind cover along the main bot path, using WaitForAllSpawned over WaitForAllDead.  This serves multiple purposes: When bots are spawned further back and need to make their way to players, new sub-waves are seamlessly blended into old ones, rather than abruptly ending and having new bots appear out of thin air.  It also allows red bots to spread more thinly around the map, catching rushers and taking flank routes without needing to be explicitly told to do so.  It also better highlights the direction players need to go if they get lost, as they can simply follow the trail of red bots to the next location in the map. 
 
== Friendly Robots ==
When adding friendly bots to your mission, you should balance them to be considerably weaker than the upcoming red robots.  If your friendly bots are strong enough to beat the mission without player interference in a reasonable amount of time, players won't feel very engaged.  A good system for picking good friendly bots using valve templates is to pick the less dangerous variant of bots you are using in your waves.  If a certain sub-wave uses crit rapid fire giant soldiers on red, send out normal giant soldiers on blu.  This way, blu robots are at an inherent disadvantage and need players to assist them to progress.   
 
Due to the complexity of balancing overpowered and underpowered blu robots for your wave, it is recommended that any lose conditions built around VIP escorting objectives either be very forgiving, or take advantage of custom behavior changing keyvalues such as InterruptAction to give players more control over the VIP.  It is highly recommended not to allow VIP bots to pick up the bomb, but still have them use default bomb-hunting behavior.  This way, if a player picks up the bomb and there are < 4 blu robots nearby*, they will be escorted by the VIP.   
 
Do note that players are able to interact with bots in several ways.  Heavies can heal them with lunchbox items, medics can uber them, soldiers can whip them, and bots will take nearby active teleporters.  All of these features can be modified or disabled.


<sup>*Max escort limit can be adjusted with FlagEscortCountOffset, or by giving the bot Action EscortFlag</sup> 
== Technical Implementation ==
==Lose Condition==
=== Lose Condition ===
In order to fail the wave when players lose, you will need to add your own [https://developer.valvesoftware.com/wiki/Game_round_win game_round_win] entity like so:
In order to fail the wave when players lose, you will need to add your own [https://developer.valvesoftware.com/wiki/Game_round_win game_round_win] entity like so:


Line 36: Line 13:
{
{
NoFixup 1
NoFixup 1
game_round_win //ignore this
game_round_win // RED win entity
{
{
"origin" "0 0 0"
"TeamNum" "2"
"TeamNum" "2"
"targetname" "bots_win_red"
"targetname" "bots_win_red"
Line 45: Line 21:
"classname" "game_round_win"
"classname" "game_round_win"
}
}
logic_relay //trigger this
logic_relay // Trigger this for player loss
{
{
"origin" "0 0 0"
"targetname" "redwin_relay"
"targetname" "redwin_relay"
"OnTrigger" "bots_win_red,RoundWin,,0,-1"
"OnTrigger" "bots_win_red,RoundWin,,0,-1"
Line 57: Line 32:
It's up to you to decide how you want players to lose.  Timers, VIP Escort, and Tanks are popular ways to do so.
It's up to you to decide how you want players to lose.  Timers, VIP Escort, and Tanks are popular ways to do so.


==Preparing Your Map==
=== Preparing A Non-Reverse Map ===
Because many maps were not designed for this mode, it is recommended that you go through your map of choice and remove unwanted map entities, cover up holes in bot spawn with [https://developer.valvesoftware.com/wiki/Prop_dynamic prop_dynamic], and generally prepare your map beforehand.  For the bulk of custom logic, a [https://developer.valvesoftware.com/wiki/Logic_auto logic_auto] in combination with [https://developer.valvesoftware.com/wiki/AddOutput AddOutputs] is recommended, as it will instantly trigger when a new wave loads.  For example, if your mission gives the blue team infinite ammo, it wouldn't hurt to remove redundant ammo packs from the map like so  <syntaxhighlight lang="cpp">
Because many maps were not designed for this mode, it is recommended that you go through your map of choice and remove unwanted map entities, cover up holes in bot spawn with [https://developer.valvesoftware.com/wiki/Prop_dynamic prop_dynamic], and generally prepare your map beforehand.  For the bulk of custom logic, a simple [https://developer.valvesoftware.com/wiki/Logic_auto logic_auto] in combination with [https://developer.valvesoftware.com/wiki/AddOutput AddOutputs] will suffice, as it will instantly trigger when a new wave loads, however this can also be achieved with [[lua]] or [https://github.com/rafradek/VScript-Popfile-Extensions VScript].  For example, if your mission gives the blue team infinite ammo, it wouldn't hurt to remove redundant ammo packs from the map like so  <syntaxhighlight lang="cpp">
logic_auto  
logic_auto  
{
{
    "origin" "0 0 0"  
"origin" "0 0 0"  
    "targetname" "mainrelay"
"targetname" "mainrelay"
    "OnMapSpawn" "item_ammopack*,Kill,,0,-1"
"OnMapSpawn" "item_ammopack*,Kill,,0,-1"
}
}
</syntaxhighlight>  
</syntaxhighlight>


Many maps do not have gates or doors blocking the blue spawn area and will require you to add your own blockades.  This can be as simple as placing a prop in front of the spawn and killing it when the wave starts, or as complex as creating a moving gate using [https://developer.valvesoftware.com/wiki/Func_tracktrain func_tracktrain].  For our example, we'll be using a [https://developer.valvesoftware.com/wiki/Func_forcefield func_forcefield], an invisible wall which can be disabled and enabled when wave start/end relays trigger using some basic AddOutputs
==== Spawn Room ====
Many maps do not have gates or doors blocking the blue spawn area and will require you to add your own blockades.  This can be as simple as placing a forcefield in front of the spawn and killing it when the wave starts, or as complex as creating a moving gate using [https://developer.valvesoftware.com/wiki/Func_tracktrain func_tracktrain].  For our example, we'll be using a [https://developer.valvesoftware.com/wiki/Func_forcefield func_forcefield], an invisible wall which can be disabled and enabled when wave start/end relays trigger using some basic AddOutputs
<syntaxhighlight lang="cpp">
<syntaxhighlight lang="cpp">
PointTemplates [$SIGSEGV]
PointTemplates [$SIGSEGV]
Line 76: Line 52:
logic_auto  
logic_auto  
{
{
"origin" "0 0 0"
"targetname" "mainrelay"
"targetname" "mainrelay"
"OnMapSpawn" "item_ammopack*,Kill,,0,-1"
"OnMapSpawn" "item_ammopack*,Kill,,0,-1"
"OnMapSpawn" "wave_start_relay*,AddOutput,OnTrigger spawnbarrier:Disable:0:-1,0,-1"
"OnMapSpawn" "wave_start_relay*,AddOutput,OnTrigger spawnbarrier:Disable:0:-1,0,-1"
"OnMapSpawn" "wave_finished_relay*,AddOutput,OnTrigger spawnbarrier:Enable:0:-1,0,-1"
"OnMapSpawn" "wave_finished_relay*,AddOutput,OnTrigger spawnbarrier:Enable:0:-1,0,-1"
Line 89: Line 64:
func_forcefield
func_forcefield
{
{
"disablereceiveshadows" "0"
"targetname" "spawnbarrier"
"origin" "2724.365479 -2303.941650 -143.139458" //rottenburg spawn
"origin" "2724.365479 -2303.941650 -143.139458" // Rottenburg main spawn
"angles" "0 90 0"
"angles" "0 90 0"
"renderamt" "255"
"rendermode" "10" // 10 = Don't render
"rendercolor" "255 255 255"
"TeamNum" "2" // 2 for RED, 3 for BLU
"renderfx" "0"
"rendermode" "10" //10 = don't render
"TeamNum" "2" //2 for red, 3 for blu
"targetname" "spawnbarrier"
"mins" "-300 -300 -300"
"mins" "-300 -300 -300"
"maxs" "300 300 300" //300x300 hu cube
"maxs" "300 300 300" // 300x300HU cube
"StartDisabled" "0"
}
}
}
}
}
}
</syntaxhighlight>
</syntaxhighlight>
''<sup>* is a [https://developer.valvesoftware.com/wiki/Wildcard wildcard] that can be used to reference multiple entities with the same prefix.  It is only limited to suffixes (*_start_relay* would not work)</sup>''  
''<sup>* is a [https://developer.valvesoftware.com/wiki/Wildcard wildcard] that can be used to reference multiple entities with the same prefix.  It is limited to suffixes only (i.e. "*_start_relay*" would not work).</sup>''  


''<sup>For more complex maps with a lot of entities, it may be beneficial to strip away certain decorative elements of the map to avoid hitting the edict limit (such as move_rope and keyframe_rope).</sup>''
For more complex maps with a lot of entities, it may be beneficial to strip away certain decorative elements of the map to avoid hitting the [https://developer.valvesoftware.com/wiki/Edict_t#Limitations edict limit] of 2048 while the wave is active (such as move_rope and keyframe_rope).


== Upgrade Station ==
==== Upgrade Station ====
Upgrade stations will need to be placed in blue spawns.  Do your best to strategically place these in areas that don't interfere with spawn points, use them to cover up holes in the map as well.<syntaxhighlight lang="c++">
 
Upgrade stations will need to be placed in blue spawns.  Do your best to strategically place these in areas that don't interfere with spawn points and cover up holes in the map if there are any.  If your map has particularly cramped spawns, it might be wise to use a smaller model than the traditional one to signify an upgrade station, such as a resupply locker or a small weapons case. Do note the "mins" and "maxs" values for the func_upgradestation entity will need to be adjusted accordingly<syntaxhighlight lang="c++">


station
station
{
{
NoFixup 1
NoFixup 1
func_upgradestation //upgrade station entity
func_upgradestation // Upgrade station entity
{
{
"mins" "-105 -100 0"  
"mins" "-105 -100 0"  
Line 121: Line 92:
"solid" "0"
"solid" "0"
}
}
prop_dynamic //blu upgrade station model, can be found on potato servers
prop_dynamic // BLU upgrade station model, available on Potato servers
{
{
"targetname" "upgradestation"
"targetname" "upgradestation"
"angles" "0 0 0"
"model" "models/props_mvm/mvm_upgrade_blu.mdl"
"DisableBoneFollowers" "0"
"disablereceiveshadows" "0"
"disableshadows" "1"
"ExplodeDamage" "0"
"ExplodeRadius" "0"
"fademaxdist" "0"
"fademindist" "-1"
"fadescale" "1"
"MaxAnimTime" "10"
"maxdxlevel" "0"
"MinAnimTime" "5"
"mindxlevel" "0"
"model" "models\props_mvm\mvm_upgrade_blu.mdl"
"modelscale" "1"
"PerformanceMode" "0"
"pressuredelay" "0"
"RandomAnimation" "0"
"renderamt" "255"
"renderfx" "0"
"rendermode" "0"
"SetBodyGroup" "0"
"skin" "0"
"solid" "0"
"spawnflags" "0"
"origin" "0 0 0"
}
}
prop_dynamic //invisible collision prop  
prop_dynamic // Invisible collision prop
{
{
"targetname" "shopcollision"
"targetname" "shopcollision"
"angles" "0 -90 0"
"angles" "0 -90 0"
"DisableBoneFollowers" "1"
"disablereceiveshadows" "1"
"model" "models/props_vehicles/train_flatcar_container.mdl"
"model" "models/props_vehicles/train_flatcar_container.mdl"
"disableshadows" "1"
"rendermode" "10" // Don't render
"ExplodeDamage" "0"
"solid" "6" // Enable collisions
"ExplodeRadius" "0"
"fademaxdist" "0"
"fademindist" "-1"
"fadescale" "1"
"MaxAnimTime" "10"
"maxdxlevel" "0"
"MinAnimTime" "5"
"mindxlevel" "0"
"modelscale" "1"
"PerformanceMode" "0"
"pressuredelay" "0"
"RandomAnimation" "0"
"renderamt" "0"
"renderfx" "0"
"rendermode" "10"
"SetBodyGroup" "0"
"skin" "0"
"CollisionGroup" "5"
"solid" "6"
"spawnflags" "0"
"StartDisabled" "0"
"origin" "0 0 0"
}
}
}
}
</syntaxhighlight>
</syntaxhighlight>
== Reverse Design Theory ==
=== Maps ===
While the majority of existing mvm maps are suitable, longer and more complex maps are best for reverse.  Bigrock, Mannhattan, and Rottenburg are examples of valve maps where it is relatively easy to stop players from getting to the hatch quickly, due to their layouts and/or overall length.  Shorter and more open-ended maps such as Decoy, Mannworks, and Coaltown, are still completely valid options, however they will require ample counter-measures to avoid players bypassing every threat and camping at the hatch.
==== Gate Maps ====
Maps with gates are very useful for structuring your waves at the cost of simplicity.  You can enable/disable bot spawns and connect your own custom logic to the outputs of the maps [https://developer.valvesoftware.com/wiki/Trigger_timer_door trigger_timer_door] entity using AddOutput, giving you the option to add rewards or enable new mission mechanics when capturing a gate.
==== Engineer Teleporter Types ====
There are 2 separate types of engineer teleporters: regular teleporters, and bot-style teleporters. Engineer bot teleporters act as a new spawn point, and will instantly teleport players to an exit on respawn with no entrance required.  It is recommended to only use bot-style teleporters in long maps that do not use gates, combining gates with this feature can confuse newer players.
=== Placing Spawns ===
[[File:Rotten.png|thumb|Custom spawn and sub-wave layout example for Rottenburg.]]
The best red spawn locations are not immediately noticeable and let bots navigate the map to hunt down players as efficiently as possible, regardless of the bomb path.
Spawning bots in easy to notice areas can break the illusion of RED having control over the map, and should be avoided.  Spawning bots very far away from the player however is equally problematic, and can ruin wave pacing.  It’s important to strike a balance between these two extremes.
=== Friendly Robots ===
When adding friendly bots to your mission, you should balance them to be considerably weaker than the upcoming red robots.  If your friendly bots are strong enough to beat the mission without player interference in a reasonable amount of time, players won't feel very engaged.  A good system for picking good friendly robots is to pick the less dangerous variant of bots you are using in your waves.  If a certain sub-wave uses crit rapid fire giant soldiers on red, send out normal giant soldiers on blu.  This way, blu robots are at an inherent disadvantage and need players to assist them to progress.     
It is recommended that VIP escorting objectives be very forgiving unless you specifically force the bot to only follow players.  Do note that players are able to interact with bots in several ways.  Heavies can heal them with lunchbox items, medics can uber them, soldiers can whip them, and bots will take nearby active teleporters.  All of these features can be modified or disabled.   


__FORCETOC__
__FORCETOC__
[[Category: Tutorials]]
[[Category: Tutorials]]

Latest revision as of 15:08, 14 November 2023

Reverse MvM is a combination of custom popfile keyvalues that flips the teams and win conditions. Instead of defending against hordes of robots, players are spawned on the blue team and must fight their way to the hatch and deliver the bomb. Designing missions around this concept can be very complex and requires heavy usage of Point Templates. It is highly recommended that you have a basic understanding of hammer and map logic beforehand, as well as a deep understanding of our popfile mods.

An example popfile for Rottenburg can be found here.

Technical Implementation[edit | edit source]

Lose Condition[edit | edit source]

In order to fail the wave when players lose, you will need to add your own game_round_win entity like so:

PointTemplates [$SIGSEGV]
{
	LoseRelay 
	{
		NoFixup 1
		game_round_win		// RED win entity
		{
			"TeamNum" "2"
			"targetname" "bots_win_red"
			"switch_teams" "0"
			"force_map_reset" "1"
			"classname" "game_round_win"
		}
		logic_relay		// Trigger this for player loss
		{
			"targetname" "redwin_relay"
			"OnTrigger" "bots_win_red,RoundWin,,0,-1"
		}	
	}
}

It's up to you to decide how you want players to lose. Timers, VIP Escort, and Tanks are popular ways to do so.

Preparing A Non-Reverse Map[edit | edit source]

Because many maps were not designed for this mode, it is recommended that you go through your map of choice and remove unwanted map entities, cover up holes in bot spawn with prop_dynamic, and generally prepare your map beforehand. For the bulk of custom logic, a simple logic_auto in combination with AddOutputs will suffice, as it will instantly trigger when a new wave loads, however this can also be achieved with lua or VScript. For example, if your mission gives the blue team infinite ammo, it wouldn't hurt to remove redundant ammo packs from the map like so

logic_auto 
{
	"origin" "0 0 0" 
	"targetname" "mainrelay"
	"OnMapSpawn" "item_ammopack*,Kill,,0,-1"
}

Spawn Room[edit | edit source]

Many maps do not have gates or doors blocking the blue spawn area and will require you to add your own blockades. This can be as simple as placing a forcefield in front of the spawn and killing it when the wave starts, or as complex as creating a moving gate using func_tracktrain. For our example, we'll be using a func_forcefield, an invisible wall which can be disabled and enabled when wave start/end relays trigger using some basic AddOutputs

PointTemplates [$SIGSEGV]
{
	corelogic
	{
		NoFixup 1
		logic_auto 
		{
			"targetname" "mainrelay"
			"OnMapSpawn" "item_ammopack*,Kill,,0,-1"
			
			"OnMapSpawn" "wave_start_relay*,AddOutput,OnTrigger spawnbarrier:Disable:0:-1,0,-1"
			"OnMapSpawn" "wave_finished_relay*,AddOutput,OnTrigger spawnbarrier:Enable:0:-1,0,-1"
		}
	}
	forcefield
	{  
		NoFixup 1
		func_forcefield
		{
			"targetname" "spawnbarrier"
			"origin" "2724.365479 -2303.941650 -143.139458"	// Rottenburg main spawn
			"angles" "0 90 0"
			"rendermode" "10"		// 10 = Don't render
			"TeamNum" "2"		// 2 for RED, 3 for BLU
			"mins" "-300 -300 -300"
			"maxs" "300 300 300"		// 300x300HU cube
		}
	}
}

* is a wildcard that can be used to reference multiple entities with the same prefix. It is limited to suffixes only (i.e. "*_start_relay*" would not work).

For more complex maps with a lot of entities, it may be beneficial to strip away certain decorative elements of the map to avoid hitting the edict limit of 2048 while the wave is active (such as move_rope and keyframe_rope).

Upgrade Station[edit | edit source]

Upgrade stations will need to be placed in blue spawns. Do your best to strategically place these in areas that don't interfere with spawn points and cover up holes in the map if there are any. If your map has particularly cramped spawns, it might be wise to use a smaller model than the traditional one to signify an upgrade station, such as a resupply locker or a small weapons case. Do note the "mins" and "maxs" values for the func_upgradestation entity will need to be adjusted accordingly

		station
		{
			NoFixup 1
			func_upgradestation		// Upgrade station entity
			{
				"mins" "-105 -100 0" 
				"maxs" "105 100 242"
				"solid" "0"
			}
			prop_dynamic	// BLU upgrade station model, available on Potato servers
			{
				"targetname" "upgradestation"
				"model" "models/props_mvm/mvm_upgrade_blu.mdl"
			}
			prop_dynamic	// Invisible collision prop
			{
				
				"targetname" "shopcollision"
				"angles" "0 -90 0"
				"model" "models/props_vehicles/train_flatcar_container.mdl"
				"rendermode" "10"		// Don't render
				"solid" "6"		// Enable collisions
			}		
		}

Reverse Design Theory[edit | edit source]

Maps[edit | edit source]

While the majority of existing mvm maps are suitable, longer and more complex maps are best for reverse. Bigrock, Mannhattan, and Rottenburg are examples of valve maps where it is relatively easy to stop players from getting to the hatch quickly, due to their layouts and/or overall length. Shorter and more open-ended maps such as Decoy, Mannworks, and Coaltown, are still completely valid options, however they will require ample counter-measures to avoid players bypassing every threat and camping at the hatch.

Gate Maps[edit | edit source]

Maps with gates are very useful for structuring your waves at the cost of simplicity. You can enable/disable bot spawns and connect your own custom logic to the outputs of the maps trigger_timer_door entity using AddOutput, giving you the option to add rewards or enable new mission mechanics when capturing a gate.

Engineer Teleporter Types[edit | edit source]

There are 2 separate types of engineer teleporters: regular teleporters, and bot-style teleporters. Engineer bot teleporters act as a new spawn point, and will instantly teleport players to an exit on respawn with no entrance required. It is recommended to only use bot-style teleporters in long maps that do not use gates, combining gates with this feature can confuse newer players.

Placing Spawns[edit | edit source]

Custom spawn and sub-wave layout example for Rottenburg.

The best red spawn locations are not immediately noticeable and let bots navigate the map to hunt down players as efficiently as possible, regardless of the bomb path.

Spawning bots in easy to notice areas can break the illusion of RED having control over the map, and should be avoided. Spawning bots very far away from the player however is equally problematic, and can ruin wave pacing.  It’s important to strike a balance between these two extremes.

Friendly Robots[edit | edit source]

When adding friendly bots to your mission, you should balance them to be considerably weaker than the upcoming red robots. If your friendly bots are strong enough to beat the mission without player interference in a reasonable amount of time, players won't feel very engaged. A good system for picking good friendly robots is to pick the less dangerous variant of bots you are using in your waves. If a certain sub-wave uses crit rapid fire giant soldiers on red, send out normal giant soldiers on blu. This way, blu robots are at an inherent disadvantage and need players to assist them to progress.

It is recommended that VIP escorting objectives be very forgiving unless you specifically force the bot to only follow players. Do note that players are able to interact with bots in several ways. Heavies can heal them with lunchbox items, medics can uber them, soldiers can whip them, and bots will take nearby active teleporters. All of these features can be modified or disabled.