I have two codes for a free copy of Rift for the pc that I received at Pax Prime. The code is only good for the Full Game as well as 30 days of complimentary game time. I believe you need to make an account first, and register with a valid credit card or prepaid card (i'm sure you can cancel the account before the 30 days of free play is over.) Anyway the codes are:
793g-2tk3-wkn2-9cgn-hjf9
3r69-9j7k-npte-gdmy-q9qp
to use the codes it says visit: riftgame.com/start
793g-2tk3-wkn2-9cgn-hjf9
3r69-9j7k-npte-gdmy-q9qp
to use the codes it says visit: riftgame.com/start