Halo 2

Halo 2 expanded on a lot of mechanics in Halo Combat Evolved and refined the formula. The mechanics from this game stuck around mostly for Halo 3 and Halo ODST with a few more changes in Halo Reach. This one suffers a little from long repeating sections and sometimes unfair difficulty on hard settings. I would recommend playing this one on normal difficulty with some skulls or on heroic. This one is very much not fun on legendary.

The Master Chief Collection is the best way to play this now.