Looking for a FPS with a good single player campaign. Suggestions?

[smroadkill15]

Great single player FPS's is Bioshock 1&2 (The first is a lot better, but the second is still good), Halo Reach, Halo 3, Halo ODST, Half-Life 2(Get the Orange Box), Singluarity, Metro 2033, COD4, Crysis 2( Just beat it), Borderland, Prey, Left4Dead 1&2, Killzone 2 (haven't played 3 yet), and COD2.