first, make it so you can use HL2 weapons but depending on the weapon, it can restict some of your abilities, second, make a map for the mod, third, make it so you can climb on a vertical pole/ climb on poles built into a map. and finaly, make it so you can climb sideways when you grab onto a ledge. you do not have to add these, but i would greatly appriciat it because this is one of my favorite addons in the game!