Tonight I played some 4 player splitscreen at a Halloween party I went to. We set up some funny games.
A surprise hit was what we called "Melee." Basically, we just used melee attacks with no shields on smallish maps like Wizard and Battle Creek. We had some newbies playing who hadn't quite gotten aiming with regular guns down yet, but they were able to do melee attacks pretty well.
We also did Rockets in Hang Em High, which I really enjoyed.
And another good one was "Road Pizza" in Blood Gulch, where the point was to get the most kills with either the tank, the warthog, or the ghost, preferably by running the other people over. It was fun.
I can't wait for Halo 2!!!