my mates and I (4 of us) get together every Wednesday night to play and more often then not we do 4 way, 2 on 2, and capture the flag Battles
I also love making maps, here's a link to my custom maps thread where I have put up full downloads.
http://www.bloomilk.com/Forums/Default.aspx?g=posts&t=7112i've also made some 4 way battle maps

Battle 1

Battle 2

Battle 4 - the other night we played this map and we had a rule that you only score points from the player to your left, it ended up being an awesome game and one we'll play a lot more.

Battle 5 - this is a good capture the flag map, we play that once you pick up the flag that ends your move, and while you are carrying the flag you only move at half speed and abilities like swap, levitate, tow cable only do half distance (no Mas-swapping)
pretty simple maps with no low objects and stuff but we have awesome games
What do you guys think? anyone else play the same sort of thing?