Sets the activity of the specified object. Also see
ActMap.txt.
If pTarget1 or pTarget2 is not specified or 0, the previous value of these action targets will be kept. To actually clear action targets use
SetActionTargets. Exception: if fDirect is set, the action targets are set even if the parameter was 0.
ObjectSetAction(GetCursor(), "Dead");
The currently selected clonk of the first player pretends to be dead.