- Added L4D2 Campaigns in Left 4 Hills 2 - Omega.
- Added "The Sacrifice" and "The Last Stand" to Left 4 Hills 2 - Alpha.
- Fixed Survival and Versus populations.
- Fixed Online, Survival and Versus modes from hard crashing.
- Finalized Co-Op modes.
- Finalized Survival modes.
- Created Co-op Versus and Versus modes.
- Recalibrated Difficulty and Companions Manager.
- Rebalanced all monsters vs players dynamics.
- Raised Handgun's crosshair return timer.
- Increased all shotguns distance damage output.
- Rised Hunting Rifle A damage output.

- Fixed Survival and Versus populations.

- Fixed a minor bug with Singleplayer co-op mode.
- Fixed Online co-op and Survival mode.

- [REDACTED]

- Fixed Companions Manager. Again.

- Fixed Companions Manager.

- Fixed Companions manager.
- Changed percentage of appearance of medicines.
- Changed bots behaviour.
- Changed Quartet Survival name to: All Survival.
- Fixed Survival Fog.
- [REDACTED]

- Finally fixed the Companions Manager.. hopefully.
- Fixed an instance of the Police Shotgun B var 2 appearing early on.

- Fixed bots manager.

- Changed the appearance percentage of medicines.
- Fixed the wrong weapons from appearing early on.
- Removed laser sights.