Good Long FPS or RPG games for PC in the past 2 years

I am going to buy a new PC game but i don't want one that I will finish in 6 hours or so i want a really long and involved game. Can you plz tell me some that you now and recommend.

I already own:

1 Bioshock

2Far Cry 2

3Fallout 3

4 Rise of the argonauts

5 Crysis

any game like them will do please help me!!

oblivion,the witcher, titan quest, the orange box has a good amount of sp fun and mass effect.

F.E.A.R.

Elder Scrolls IV: Oblivion, you'll spend 60+ hours on the game if you get the game of the year edition as well as a few mods..ferrari2001

far cry 2 no other fps is that long!Hellboard

The original FarCry....nice and long !....8)

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[QUOTE="Hellboard"]far cry 2 no other fps is that long!RK-Mara