R.E.P.O. Mutators

Inject some chaos (and possibly despair) into your R.E.P.O. runs with Mutators! Random level modifiers will be chosen to alter your current level in some way.
NOTE: Everyone needs this mod for it to work. Singleplayer currently experimental.

Major update V1.0.0: Multi-mutators

Multi-mutators are now available! Multi-mutators allow the possibility of multiple mutators being active at the same time.

The scaling type can be adjusted in the mod's config:

Additionally, a rules file is now provided to allow for more fine-grained control over mutator selection.
Don't like a particular combination? Just set a mutual exclusion rule in the rules file.

Really like a particular combination? Consider creating a custom multi-mutator!

Current Mutators

Configuration

Mutators are selected via a weighted random system. The weight of each mutator can be adjusted in the config. Each mutator has the following configurable properties:

You can also configure the chance of no mutators showing up at all. This uses a percentage, not a weight.
Additionally, most mutators have additional configuration options.
The host's config always takes precedence. If this does not appear to be the case, please submit a bug report.

Upcoming features

• More mutators
• General improvements to mutators and internal systems

Suggestions and issues

Suggestions can be made in the dedicated thread in the R.E.P.O. Modding Server on Discord or though Github issues.
Any issues found may also be reported though these channels, although creating a Github issue is preferred.

Incompatibilities

• Any mod that allows people to join during a level.

For developers

Interested in contributing or registering mutators with your own mod? Check out the GitHub repository.

v1.0.2

• Fix Moon Scaling being unable to select any mutator after a certain amount of levels due to unsanitized base-game input.

v1.0.1

• Fix user-generated multi-mutator descriptions being overwritten by the default ones.

v1.0.0: Multi-Mutators

• Add headline feature: multi-mutators.
  • Multiple mutators can now be active at the same time.
  • Multi-mutators can be automatically generated or user-defined.
    • Chance of generated mutators is configurable.
• Add scaling types for multi-mutators:
  • Moon Scaling: configure the amount of minimum and maximum active mutators per moon level. Plus the chance to use generated multi-mutators.
  • Random Scaling: configure the amount of minimum and maximum active mutators, the amount is randomly selected. Plus the chance to use generated multi-mutators.
  • None Scaling: turn off all multi-mutators. This is effectively how selection worked pre-v1.0.0.
• Add user-defined multi-mutators.
  • It is now possible to configure your own multi-mutators through JSON files.
    • These JSON files are loaded from your profile's BepInEx\config\Mutators\MultiMutators folder.
    • Consult the wiki for more details.
    • In theory, multi-mutators are synced over the network, meaning clients do not need to have the same multi-mutators configured.
      • However, the do need the same default mutators.
• Add support for the mutator overlay to display multiple mutators.
  • Active mutators' names and descriptions will be cycled through.
• Add new mutators:
  • Size Matters: players are shrunk. Enemies, valuables (+ items) and carts can optionally be scaled down too.
  • Null Signal: the first meta-mutator. Hides all active mutator information, except its own.
    • Cannot appear on its own. By default, it needs at least 2 other mutators for it to appear.
• Ultra-Violence and The Floor Is Lava are now disabled by default.
  • Can still be enabled in the config.
• Make Hunting Season more resistant to errors during the valuable removing process.
• Add "play nice" support for certain mutator combinations:
  • There Can Only Be One + Duck This → All enemies will be replaced with Apex Predators if possible.
  • Volatile Cargo now uses whichever is higher between current valuable value and original value.
• Change "No Mutator" odds from being weighted to being percentage-based.
• Add selection rules and rule files:
  • Two JSON rule files are added under your profile's BepInEx\config\Mutators folders.
  • Default rules are automatically provided upon the first launch.
    • These can be disabled and/or edited. You are also free to create your own rules.
    • Rules can, for example, be used to make certain mutators mutually exclusive.
      • Combinations deemed unfair or impossible are provided by default, consult the aforementioned rule files for more details.
• Add ScalerCore as a required dependency.
• Remove BepInEx from the dependency list.
  • It's still required, but it's also a transient dependency of both ScalerCore and RepoLib.
• Optimize mod size: 2MB → approx. 200KB.

v0.6.6

• Fix the map guiding the player in the wrong direction during Ultra-Violence
• Increase default monster spawnrate on-break from 10 to 65 percent during Sealed Away

v0.6.5

• Add support for REPO v0.4.0

v0.6.4

• Add a config option to disable the on-hurt laser activation for the Firing My Laser mutator
• Amalgam now attempts to clean up doors that broke during level generation
• Map/Level exclusion now happens earlier in the mutator setup cycle
  • The goal is to remove the excluded maps/levels from e.g. the MapVote selection
• Fix a bug that could cause levels to be permanently (= until game restart) removed from the available levels

v0.6.3

• Fix Voiceover mutator incorrectly setting the audio mixer to lobby

v0.6.2

• Update Mutators to work with R.E.P.O. v0.3.0 and REPOLib v3
• Firing My Laser laser should now have a grace period after reviving during which the accidental fire mode is disabled

v0.6.1

• Add configurable grace period activated when being revived during The Floor Is Lava
• Fix Less Is More host to client settings not being synced properly
• Fix items breaking when indestructable during Less is More
• Correct Less Is More durability division factors being switched
  • Please consult your config to see if the lower bound (weak) is still lower or equal to the upper bound (strong)

v0.6.0

• New Mutators: Less Is More, Amalgam
• Less Is More: Valuables start out with less value but increase in value when taking damage, normal breaking mechanics still apply
• Amalgam: The level will consists out of rooms from all available installed levels
• Remove weapons which double as valuables from Hunting Season weapon selection
• Fix Hunting Season from softlocking when there are no eligible weapons
• Add toggle mode to mutator name interface: Toggle with Description
  • When selected, the mutator name will be (unhidden) together with the mutator description
• Rewrite internal metadata system (again)

v0.5.9

• Fix Out With A Bang mutator being broken
• Add config options for Out With A Bang explosion size and damage
• Add enemy blacklist config option to the Hunting Season mutator

v0.5.8

• Add minimum player count config option to have Ultra-Violence mutator
• Fix Handle With Care mutator causing low amount of valuable spawns
• Fix mutators with excluded enemies from crashing when removing all enemies for a tier

v0.5.7

• Fix Firing My Laser laser oneshotting every monster

v0.5.6

• Add config option to keep the lights on during Ultra-Violence
• Fix issues caused by the new update
  • Fix Firing My Laser laser not firing
  • Fix Special Action UI not showing
  • Fix health not updating right away when consuming a health upgrade during Protect The Weak
  • Remove unlimited active orb patch for Hunting Season
    • This is now vanilla behaviour

v0.5.5

• Fix mutators not being disabled when going to shop on beta
• Add possibility to add excluded enemies for the One Shot, One Kill mutator

v0.5.3

• Fix Sealed Away causing infinite loading on beta (for real this time)

v0.5.2

• Add small fix to make Sealed Away and Volatile Cargo not cause infinite loading on beta
  • Beta is still not officially supported, this is more of an anticipation change, since the update is said to release soon
• Change The Floor Is Lava default damage to 1, down from 10.
• Fix Special Action UI spamming errors in console while spectating

v0.5.1

• Add potential fix for None mutator being selected as a fallback even though there were other eligable mutators available
• Add config option to disable enemy spawns during the The Floor Is Lava Mutator.

v0.5.0

• Add possibility to turn off manual laser action for the Firing My Laser Mutator
• New Mutators: Voiceover, The Floor Is Lava
• Voiceover: Player voices are randomly swapped between all players
• The Floor Is Lava: Players take damage when touching unpadded surfaces, this happens every second
  • Damage is configurable
  • Optionally, it is possible to choose an amount of players in the config that will be immune to this mutator's damage
• Add lifecycle hooks for developers
• Log a warning in the host's console when using the None mutator as a fallback

v0.4.4

• Prevent Firing My Laser laser from firing when taking damage from healing another player
• Adjust Laser damage to enemies from 20 to 30 per tick, this is now also configurable
• Add config option to disabled Apollo 11 Anti-Gravity on items that are in cart/extraction

v0.4.3

• Prevent laser from firing after being revived after self destructing

v0.4.2

• Prevent Firing My Laser laser from continuing after being revived

v0.4.1

• Prevent Firing My Laser laser from activating while typing in chat
• Hide Special Action UI while spectating

v0.4.0

• Prevent 0 damage instances from killing the player during One Shot, One Kill
• Reduce Duck This default cooldown to 60 seconds, from 120 seconds
• New mechanic: Special Action
  • Special Action HUD Y position and keybind can be configured
• New mutators: Protect The Weak, Firing My Laser
• Protect The Weak
  • One player spawns as the bodyguard, equipped with a tranq gun with infinite ammo and increased health
  • Other players spawn with significantly reduced health
  • The bodyguard dies if they are the last one standing
• Firing My Laser
  • Semibots get access to Special Action: Laser
  • Laser special action has a configurable cooldown (60 seconds default)
  • Laser also activates when getting hurt, this ignores the cooldown

v0.3.1

• Prevent mutator description popping up when other players use their map tool
• Make custom UI elements disappear while in the ESC menu

v0.3.0

• Improve codebase maturity
• Add mutator descriptions, including a bunch of related configuration
• Add "bad luck protection" on mutator selection logic
• Add singleplayer support (experimental)
• Force the game to be more lenient with maximum allowed of active monster orbs on the level while Hunting Season is active
• Add Sealed Away mutator
  • Breaking valuables has a configurable chance to spawn a monster
  • These are permanent additions to your level, they respawn just like normal monsters
  • Sealed monsters have had their powers siphoned
    • Sealed monsters do not have an orb drop limit
    • Sealed monsters have significantly reduced health and appear smaller than their normal counterparts

v0.2.3

• Fix ArgumentOutOfRangeException causing infinite loading screen while the There Can Only Be One mutator is active

v0.2.2

• Fix enemy blacklist for Ultra-Violence and Hunting Season being applied after enemies had already been chosen

v0.2.1

• Add the option to enable instant revive in truck or active extraction point for the One Shot, One Kill mutator. Disabled by default
• Disable healing friends during One Shot, One Kill. No more accidentally one shotting yourself
• Disable the spawning of monsters that do not drop an orb while the Hunting Season mutator is active
• Increase player grab range as if 3 levels higher while Rusty Servos is active
• Add configurable monster spawn blacklist to Ultra-Violence
• Prevent custom keybinds from triggering while having chat open

v0.2.0

• Fix issue where the Hunting Season mutator would spawn weapons which had already been used
• Add more bang to the Out with a Bang! mutator, explosion size and damage now scales with enemy difficulty tier
• New mutators: There Can Only Be One, Volatile Cargo
• There Can Only Be One: All enemy spawns are the same monster, e.g. all Robe
• Volatile Cargo: Valuables explode when destroyed, explosion size and damage scales with value

v0.1.4

• Fix issue that would cause items that spawn other items onDestroy to crash the Hunting Season Mutator setup

v0.1.3

• Fix issue that would cause client mutators to desync from the host's when returning to lobby after the arena

v0.1.2

• The Duck Mutator This now always attempts to spawn a duck
• Make current mutator and target (e.g. president) UI elements size configurable
• Add configurable keybind to hide current mutator UI, bound on H by default

v0.1.1

• Fix enemies getting affected by Apollo 11 Zero-Gravity
• Add configurable keybind for downwards momentum to Apollo 11
• Add configurable Y position for current Mutator overlay

v0.1.0

• Add the ability to lock mutators between configurable levels
• Add config option to prevent the surplus from being instantly destroyed and having its value multiplied by the Handle With Care Mutator

v0.0.1

• Initial pre-release