My Perk Ideas
Fisticuffs Extra Frothy: Increases all melee damage towards zombies (Does not affect bosses/denizens).
Diet/lite perks: Reduced effect perks for a lower cost. Original perk can be bought to upgrade to full effect. Could be used in hardcore mode.
Homebrew Perks: All the perks have effects added or removed to suit the map. The appearance of the perk machine would vary depending on the setting of the map.
Game Mode Ideas
Hardcore mode: Reduced HUD, extra damage taken, Friendly fire active, much like in Multiplayer.
Capture the 115: Needs a better name really. Anyway, this is a 4v4 mode much like grief, with CTF thrown in. The CIA must destroy/contain the 115, while the CDC need to research/retrieve the 115.
Infection Mode: With each hit taken, the player's infection gauge will fill. When the gauge is full, player death is permanent and the amount of zombies attracted to the players is increased (Double max spawn?). Infection can be slowed or reduced with medicine found or purchased round the map. Players can use this on themselves or team members. However, medicine costs more with each purchase, with a starting cost of 10,000.