Pick any one out of these games. Mine is probally Black Ops or Maybe MW3.

Modern Warfare:

World At War:

Modern Warfare 2:

Black Ops:

Modern Warfare 3:

Battlefield:

Battlefield 2:

Battlefield 3:

HomeFront:

Original Halo;

Halo 2:

Halo 3:

Halo Reach:

Halo CEA:

Gears of War:

Gears of War 2:

Gears of War 3:

007:

Dead Island:

Dead Island 2:

Borederlands:

Portal:

Portal 2:

Any Medal of Honor Game:

Counter Strike Source;

Counter Strike 1.6:

Combat Arms:

Bio Shock:

Bio Shock 2:


Need some more ideas on some other shooter games....