Fudge Packin' is the way to go for the entire Postal experience.

User Rating: 9 | Postal Fudge Pack PC
The big draw here is the Apocalpyse Weekend expansion to Postal 2, Share The Pain which is the multiplayer add-on and updated original Postal 2, and the excellent mods, A Weekend In Paradise and Eternal Damnation. ED in particular is great because of its great story, level design and action/weapons, and zombie killing, the one game where you aren't playing as the Postal Dude.

The new weapons in the expansion and mod's are worth it alone, giving you all kinds of ways to handle situations.

It's 2010 and the Unreal 3 engine still holds up well, and all of the graphics and action in these games are well-done for an indie developer, are completely insane and juvenille, depraved, and satisfying.

The original Postal is also included here, but, I found the controls so heinous that I didn't spend much time with it yet. It's similar to playing the original GTA for instance, extremely out-dated and simplistic.

The awesome Fudge Pack will keep you busy until Postal 3 comes out, hopefully some time this year yet, and the legacy will continue.