Guest passes to various games (KillingFloor)

[Celtic]

I have two killing floor guest passes if anyone wants them.
Make this the official guest pass thread for people who buy games alot?

[PhrozenFlame]

What does the guest pass do specifically? Do you get to play it a few times before it's wiped off your hard drive, or do you just get the game?

[Original]

It's just a time trial thing. Few days or something.

I've got one but can't remember which game. Will post it when I get home.

I also have a few keys for Zero Gear beta (Mario Kart like game on steam) if anyone wants to try it.