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Cause And Effect

At the start of each round, a Cause and Effect is picked from a list. When the cause is fulfilled, the effect will trigger.

there are currently over 450 possible combos such as:
"when a perk is purchased, 5 zombies spawn"
"when a powerup spawns, a random perk is lost"
"when a door is purchased, gain 10 percent of your total points"
"when a player swaps weapons, Wallbuys are randomised"

there are some combos deemed "illegal" which are contradictions of themselves, which will normally not happen unless you allow them, such as
"when a zombie spawns, 5 zombies spawn"
"when a powerup spawns, Spawn a random powerup"
these are normally removed as they would otherwise make the game impossible to play, or cause endless loops

this mod should work on almost every map, including custom maps