Halo 2 > Halo 3 > Halo 3 ODST > Halo Reach > Halo CE
Based on campaigns.
Posted by: Suikoden
You played CoD 4 witch is good, now switch to MW2,MW3 or Blops
and feel how all the training just disappears and some brain cells.
Yeah i hated Blops and MW2 was kind of a let down, have yet to play MW3