Wall Walk is an alien ability that allows alien players to climb walls and stick to ceilings. It has a very big strategic potential and can be used for making ambushes, hiding from the attack, and with Advanced Grangers available, can be also used to hide the alien buildings from humans. It is toggled, by default, with C, the crouch button, but can be re-binded to any key the player wants. List of units that can wall-walk: Dretch, Advanced Granger, Basilisk and Advanced Basilisk. Marauders and Advanced Marauders can walljump, though.