"allammo" gives you infinite ammo
"allweapons" is very weird, you get a strange weapon with laserballs and a funny beam as secondary (it repairs like hell though, hottie 2.0). also you get a rocket launcher that can be charged up to 3 rockets funny shit, but obviously dont work in mp.
also try "changesize" (if i remember correctly), you can get a tiny or suuuperbig mammy (1.0 is standart, you cant enter/leave vehicles when changed)
but i just played around some minutes in skirmish, dont know if and what effects bots etc