The terrain has to be one randomly generated by the in-game editor, try to select terrains that offer good hides and minimize the number of easy kills and big piles during the first turns of the round.
Forbidden bugs (Remember that rope/bungee knocking is allowed)
* Bungee from Jet Pack (unless both players clearly agreed on allowing this).
* Bow/bat/rope angle modifications.
* Walking on top of the indestructible barrier of a cave.
* Skip walking using the mouse.
* Floating weapon glitch