Here's an idea for a mod.
Zombie Survival: At the start, there is one player playing as a zombie(an altered player model that is limited to a third of the speed of normal running, hands as weapons,no jets,twice as much health as humans), the rest are humans, the zombie has twice as much health as the normal zombie, and goes a tad faster than humans, until it has another zombie siding with it.
Humans have LIMITED ammo, and only start with Desert Eagles(human fists dont do much damage to zombies, otherwise itd be too easy), normal health, NO jets, primary weapons come after a cirtain ammount of kills(il explain in a bit), and can eather team up to survive or slaughter eachother and doom the round.
There can be modes for the mod:
Human Survival: Humans team up or run around renegade to the chaos.
E-M-F-H: Every Man For Himself. This is the easily the best round killer, humans can eather decide to watch eachother's back or just kill eachother and give the zombies a break.
Soldat Mode: This mode allows primary weapons and jets to be used, zombies get jets too, but zombies have increased health due to the upperhand the humans gain.
Kill Count, This is for the EMFH and HS modes:
8: Gets you an AUG.
20: Gets you a back-up chainsaw.
45: Gets you a couple grenades and a health regenerator for your health.
55: Gets you a flamethrower.
60: Game kicks you to spectator and you are listed under "Survived"(Congrats)
Rankings, a couple i will now list for you:
Damage to Zombies: Shows the top scores of those who hurt the zombies the most.
Survival Timer: Shows those who survived the longest.
Brains Eaten: Shows zombies that killed the most humans.
Damage to Humans: Like the Damage to Zombies ranking, but for humans.
Player listing: Looks like the below.
Name Time Status Kills
Freakypred 13:37 Survived 123
Billy 3:42 Undead 36
Dutch 4:20 Surviving 45
Zombie 0:00 Undead 5
And so on...
Music can be included, and a few ZS maps will make things easier to play with.
There can also be zombie classes.
Thats all i can think of for the mod, if anyone wants to work with it, i can help