Halo 2 -- When Delta Halo fires its termination pulse and the radiation flares out in a cloud. Beautiful.
Halo 3 -- The music in the final Warthog run.
Halo Wars -- Cutscene titled "Monsters." BAMF.
Halo 3: ODST -- Opening cutscene, the drop into New Mombasa. Had my heart pounding.
Halo: Reach -- Lone Wolf. Write your own ending.
Halo 2 -- Where's my ending?
Halo 3 -- Seriously, where's my ending?
Halo Wars -- What do you mean I can't hijack Scarabs in multiplayer?
Halo 3: ODST -- None. This game is perfect.
Halo: Reach -- Where's the dialogue?