Source: Steam Community (opens in a new tab)
The Mystery Box Update
The Mystery Box:
- Added the Mystery Box
- Added the first Wumbo Weapon: The Ray Gun
- Added 3 New Achievements

Changes & Improvements:
- The extra coin from Zillionaire no longer counts towards your "Take-Home" total
- The extra coin from Zillionaire now glows, and spins faster
- You now make an out-of-breath sound when you start to heal
- Each weapon now creates different-sized bullet holes
- The Pipe Room weapon wall buy has changed position
- The TV Room layout has been slightly altered
- The Winchester does more damage but is slightly less accurate
- Starter weapons have slower base speed but a higher kinetic energy multiplier
Bug Fixes:
- The Spade is no longer invisible when Ruction is enabled
- Zombies will no longer spawn inside of furniture