I have a guest pass for Counter Strike Source which runs out on 17th May.
If you would like this, post in this thread and I will choose a post number using random.org.
Winner will then be notified in the thread tomorrow evening at around 8pm.
I have no idea how long the guest pass is, so please don't ask.
All I know is that it allows you to trial the game.
Only members with 200+ posts can apply.
Good luck! :o)