What are your top ten favorite first-person shooters?

[uadfa]

digitalentourage said:
1. Half-Life 2
2. Stalker: Shadow of Chernobyl
3. Call of Duty 4: Modern Warfare
4. Tribes (did everything halo did and better, and before.)
5. Halo. CE
6. Half-Life
7. F.E.A.R.
8. Killzone 2
9. Far Cry
10. Crysis

No, Marathon did everything before Halo did. No really, the health systems are very familiar.