ii recently found a mod; insane zombie; where there is 1 team made of zombies (ts), with speed reduced gravity, a knife, nv, and 800 hp, and a team made of normal players (cts), able to buy anything but nv, flashes, smokes, and paras
(no bots)
ff was on; with no punishment other than kicking somone after 2 tks, i found this to be vital to the balance, (although reviving somone just to kill them agein was fun)
the mod disabled bomb planting, vip's ability to be saved, killed hosties, etc
the maps have to be edited manualy so that all lights were darker
cts started with 16000 and could purchase both t and ct weapons
a ct could buy 1 revive pack per round, hold 1 at a time, and a revived ct couldnt
the kit was put in inv in the form of a flash nade
cts could also upgrade their flashlights to be larger and colored (pointless, but interesting)
a t (zombie) could eat a killed ct, and regain 200 lost hp
the server was fairly popular (although people often stacked because a lot of maps were unbalenced and cheat detection was ****ed up)
camping became a commen tactic, humans rushing to a place they could hold off while the zombies took them apart, then the few who made it tryed to hold the bottle neck as zombies rushed, although in some maps it was insanly unbalenced depending on the ammount of players (when 18 people are spraying m4s down a ladder, 7200 hp worth of zombies die in seconds)
i think a zombie mod similar to this but better might work, with zombie and human experience