11 Brand New Weapons Added:
- Glock -> M9 -> Desert Eagle (Level 9 Unlock)
- UZI -> MP5 -> P90 (Level 41 Unlock)
- M4 -> M16 -> AK-47 (Level 65 Unlock)
- Portal Gun -> ASHPD (Portal Challenge Unlock)
9 Brand New Challenges and Achievements Added:
- Dimensional
- The Cake is a Lie
- Space-Time God
- Double Damage
- Opportunist
- Mr. X2
- Bouncy
- Ricochet
- Master of Geometry