I feel like Project Zomboid would be a perfect game for Crowd Control. You could do the following:
Harming the player
- Play “jump scare” sound
- Spawn X amount of zombies near the player
- Add status ailments like boredom, hunger, thirst, depression, etc
- Infect the player (This will start the zombification process)
- Start a helicopter event
- Reduce the condition of the currently held/random item
- Turn zombies into Sprinters for X amount of time
- Reduce vehicle parts condition
- Stall car
- Jam player’s gun
- Pacifist Mode (Player is unable to equipment weapons in hand)
- House Alarm (sets of a house alarm nearby)
- Add Bad trait
- Damage clothing
- Turn off power and/or water
- Reduce Skill Level
- Rot all food
Helping the Player
- Improve status ailments like hunger, thirst, etc
- Repair condition on currently held/random item
- Fix vehicle
- Cure Zombification
- Heal wounds
- Make player temporarily invisible
- Infinite Ammo
- Add Good Traits
- Turn power and/or water on temporarily
- Gain Skill Level
Just to name a few. There’s plethora of things that could be invested into a player’s run and make the game a great experience for both the player and the viewers.