Pros:

- Stargate.
- The same Pros like the L4D1 version.
- Here we've got melee weapons. ;)
- With Chargers, Jockeys and Spitters, the campaign is more challenging that L4D1 version.
- Like version of L4D1 custom dialogs between survivors.

Cons:

- Same Cons that i found on on L4D1 version.
- With the Tank AI improved in L4D2, the fails in tunnel with animated vehicles are more epic.

Conclusion:

I have played SG-4 on L4D1 and L4D2, and without the custom dialogs and new weapons, this campaign is same that L4D1 version.

I like it. But the senses obtained in version 1 are repeated in version 2. With the improved AI of some special infected on L4D2 and the bugs on navigation, the epic fail times repeats a lot.

I prefer L4D1 version, but keep working on this too. Will be come better in futurible versions.

Anyway, thanks a lot for your hard work.