You can find all Slayer minigames in the Slayer.Minigames scriptgroup or in the minigameGroup simset.
You can find the minigame that an object belongs to with getMinigameFromObject(%obj).
Edit:
How would I reset a minigame that the host put on?
Dedicated server btw
A nice little shortcut to find the host's minigame is
%mini = Slayer.Minigames.getHostMinig ame();Then just do
%mini.reset(0);