Since my last suggestion post, more trigger actions have been added which were similar or the same as some I had suggested. I have removed those, and have added more actions I've recently thought of.
Engine Mark:
Enable manual round ending (MP only)
Randomize player slots (disables team points) ~~Makes each player a random Player Character (not actors)
Organize player slots ~~Makes each player take up the lowest slot (If player 1 leaves and theres a player 2, player 2 becomes player 1)
Trigger:
Gameplay/Scenario >End round when all players of team 'A' have died
Gameplay/Scenario >End round
Gameplay > Set disabling of kinetic module to value of parameter 'A'
Gameplay > Set disabling of psi swords to value of parameter 'A' for player 'B'
Gameplay > Disable multiplayer dead player messages ~~ Dead players can't talk
Gameplay > Enable multiplayer dead player messages
Gameplay > Lock character 'B' camera at region 'A' with intensity multiplier of 1 ~~ able to lock individual player's camera
Character > Force idle character 'A' to move to region 'B'
Character > Accelerate character 'A' X speed by value 'B'
Character > Accelerate character 'A' Y speed by value 'B'
Character > Accelerate character 'A' X speed by value of variable 'B'
Character > Accelerate character 'A' Y speed by value of variable 'B'
Timer > Set the frequency of calls of Timer 'A' to value of variable 'B'
Movable > Make movable 'A' visible
Movable > Make movable 'A' invisible
Movable > Change Speed of Movable 'A' to value of variable 'B'
Gravity > Change the gravity to the value of variable 'A' (Default is 0.5)
Barrel > Explode barrel 'A'
Barrel > Spawn barrel type 'A' at center of region 'B'
Var > Set variable 'A' to 1 if player 'B' crouching and 0 else
Var > Truncate variable 'A' by 'B' amount of characters
Var > Concatenate value of variable 'B' to variable 'A'
Var > Save rag-doll intention of character 'B' to variable 'A'
Trigger execution/Character > Execute trigger 'A' when player 'B' got damage
May be impossible due to mechanics:
Gun > Give gun 'A' ammo value 'B' ~~Makes any gun have limited shots
Gun > Set gun 'A' projectile speed to value 'B'
Maybe there could be a designated site/page for approved images and sounds (like freemusicarchives for music?):
Environment/URL > Change sky image to image at URL 'A'
Decoration/URL > Change decoration image to image at URL 'A'
Sound/URL > Play sound at URL 'A'
Gun/URL > Change gun 'B' image to image at URL 'A'
Gun/URL > Change gun 'A' projectile image to image at URL 'B'