Close
If you already activated a game, you can't trade it. You can only trade it if you have a copy in your inventory. You can see my inventory here to see some examples of tradable games (look at the "steam" category). If you bought the game on steam and it is not working, you might want to take a look at their refund policy
Is there something on my list of games that interests you for it?
http://www.steamtrades.com/trade/qCE46/
Alien vs predator
ANYTHING
cant run Alien vs Predator