From the back of the box:

New Multiplayer Gameplay includes:

• 4 game types:

- SNATCH: Fight for the fabulous Postal Babes! Snatch the enemy babe and score!
- GRAB: Battle to collect all 10 bags, each bag makes you stronger!
- Deathmatch: Choose from 25 characters including gary Coleman and Osama!
- Team Deathmatch: Share the pain with 17 insane teams including Team Taliban and The Gimps

• 14 new multiplayer levels
• In-game server browser
• Dedicated and non-dedicated server mods with remote admin
• Customizable game settings

Plus the enhanced POSTAL 2 single player game with new features:

• New "WEapon of Mass Destruction"
• New "Insano" and "They Hate Me" difficulty modes
• New "Underhub" and "Tora Bora" maps
• Faster load times!