- United We Stand (Survival): Fixed issue where the Survivors spawned at the incorrect area in The Passing Map 1 (Riverbank).
- Swarm & Gun Game Swarm Modes: Fixed issue which caused finales to last forever.
- Two-player Mutations: A Survivor bot will now spawn if you play the Mutations in Singleplayer.

- Fixed an issue with Mutations that use the Scripted HUD which may not have functioned properly.
- ZSL Weekly Mutations: Fixed a coding issue that prevented the modes from working properly if VSLib wasn't present.
- United We Stand Co-op: Fixed issue on The Passing Map 1 where the L4D1 bots would spawn at random areas upon map restarts.
- United We Stand (Survival): Doubled the health for Tanks, but restored other spawn intervals to default to make it easier.
- Prevented L4D1 Last Man On Earth from appearing on the regular Mutation list.

- United We Stand: Made it so the real Zoey spawns on L4D2 Survivor maps instead of "Fake Zoey".
- Wave: Changed the "Fake Zoey" bot into the real Zoey when hired from the trader.

- Special Surprise: Fixed issue where medical and throwable items were being removed from the Survivors inventory at the start of each map.
- United We Stand Co-op: Fixed issue on The Passing Map 3 where the game would crash when restarting the map.
- Survivor Swap: Fixed issue where the survivor names weren't swapped properly for info_survivor_spawn entities, resulting in broken intro and outro cinematics.

- Re-added Tank Attack and Left 4 Gun Game: Tank Attack due to popular demand!
- Updated Tank Attack to no longer use VSLib as well as add the L4D1 Tank model to the list of random Tank models to use when spawned.

- Removed VSLib files and updated all Mutations to no longer use VSLib. (Please let me know if you encounter any issues caused by this change)
- Removed Tank Attack, has been replaced by the official Tank Run Mutation.
- Replaced Left 4 Gun Game: Tank Attack with Left 4 Gun Game: Tank Run.
- Added "L4D1 Last Man on Earth", same as Last Man on Earth except only L4D1 items and infected spawn.
- Updated all Uncommon Infected Mutations where SI would spawn immediately when leaving the saferoom, the initial spawn timer has now been set to 30 seconds.
- Updated United We Stand modes, fixed an issue when an extra Survivor died on the previous map, their health would be set to 1 instead of 50 if the round restarts.

- Added support for new Quick Match flyout menu.

The changes include the following:

- Fixed the ZSL modes so the Survivors will now properly warp into the saferoom if you fail to complete the map after 3 attempts.
- United We Stand modes - Fixed extra bots not properly retaining their weapons and stats across map transitions.
- United We Stand modes - In L4D1 Campaigns, the extra L4D2 bots can now be revived with a defib.
- Survivor Swap - Fixed c6m1 crash caused by not setting the Witch Bride model in the mission file.
- Removed the requires_dlc1.txt used for the Survivor Swap mode. Will update with a different method later.

The changes include the following:

- (VSLib) Moved VSLib files to a unique folder for compatibility. There will no longer be any conflicts with mods that use VSLib.
- Updated the main-menu with the addition of Versus Survival, and the removal of the Singleplayer icon.

- Updated the following Mutations:

VIP Escort modes - The Survivor's name will now be properly set at spawn, without needing to auto kill/defib him immediately to set his name.
United We Stand modes - In L4D2 Campaigns Zoey will now retain her name after being defibbed.
United We Stand modes - In L4D1 Campaigns the L4D1 Survivors are now playable and the L4D2 Survivors will now spawn as the extra bots.
All Uncommon Infected modes - Updated population data to support the new population names.
Survivor Swap - Updated mission files for the new melee weapons, added CSS guns and L4D1 SI models for the L4D1 maps.
PVP modes - Updated mission files with the new melee weapons.
Wave - Updated mission files with the new melee weapons.

- Some minor Mutation edits.

The changes include the following:

- Updated all Anti Special Squad modes, survivors now ragdoll upon death.

- Updated various modes where the survivors only have 1 life, made it so you will no longer start black & white or hear the hearbeat sound.

- Updated some Tank modes, made the Tanks spawn automatically via ZSpawn().

- Updated all ZSL Campaign modes, tweaked the code for handling the saferoom doors.

- Updated "Nuclear Gnome", gave the Gnome carrier infinite melee bashes without cooldown and made the Gnome vanish when detonated.

- Updated "Death Clock: Random Edition" and "Triple Threat", the code used to randomly select which infected to spawn has been improved.

- Updated "Triple Play" and "VIP Escort: Triple Play", changed some code to make the filesize smaller and fixed the VIP not starting with a throwable.

- Updated all VIP Escort modes, the Survivor now takes only half damage from Spitter goo.

- Updated the VIP Escort modes that allow defibrillators, you are now allowed 30 seconds to revive the Survivor if he dies. If you don't, you'll fail the mission.

- Fixed "VIP Escort: Split Decision", the Survivor's name will now appear and the mode will now function properly.

- Fixed "VIP Escort: Tank Brawl", the Tanks are now spawning like they should.

- Fixed "Hunting Party Versus", it will now convert all players into Hunters.