Quake 2, Halo,Blood,Duke 3D, Unreal Gold(one with exspantion),Unreal tournament,Half Life, Turok 1-3(despite 3 being broken), Dues ex, System Shock,Halo 1 and only 1, Time splitters was fun as well.
Most newer games are filled with so many issues they simply lose their shine and become just another game.
HL2 is an ok game the levels are large but kinda bland the ending to 1 sucks , story wise its better than most but the weapons feel off and resulting game just feels off.
Bioshock/FO3 is under developed and unfinished from rushing it to market.