I realize I'm also late on these games, but lately I'm playing:
Left 4 Dead
Half-Life 2 (just finished Half-Life: Source... so I can finally say I've played it)
To be played sometime in the future:
Team Fortress 2
The rest of the Half-Life 2 episodes after I finish Half-Life 2
You will certainly like Portal. I avoided that game for sometime when it initially came out and around a couple of months ago i had a jonzing for some action puzzle games (thank you Braid
) so i fired this up and never looked back. Awesome game and i don't believe i avoided it for so long.
At this point i am in game purgatory. Just finished X-Men Wolverine: Origins which is a pretty fun if not a repetitive and slightly unchallenging game that is IMHO (shock horror) unnecessarily violent....it was just a turn off......i have no problem with violence and gore in games but this one just seemed to relish in its gratuity.....maybe i'm getting a bit to old but i found myself roiling my eyes more than i could imagine.
Also just finished Mirror's edge twice (thank you Nvidia PhysX) and i really enjoyed it although it could get slightly frustrating, was too short for my liking and wished there was a bit more gun combat situations since the little they had was extremely enjoyable. First run was on medium and second run was on hard. Still an awesome game even if the end of game boss and climax (if you call it that) was weak.....an i mean weak
.....it just ended without much of a fight or satisfaction.
So far i'm just waiting for payday so i can get me mits on Infamous - The demo was awesome and i can't wait.