Guild Wars 2

May I suggest Escalade?

http://en.wikipedia.org/wiki/Escalade

It’s basically a ladder that allows invaders to climb up the wall and attack within. It’s a siege weapon from the old ages that could be a new tactic for WvW. Personally I find the ranged siege to be immensely boring. Balancing could be something like receiving extra damage while climbing up, easily destroyed, takes 10 seconds for each invader to go up, and requires 350-500 supplies (so that no small PUGs can do sneak attacks, and high supply foils instant mesmer portals.)

That’s interesting, but without body-blocking it could be rather OP. Now, if we could drop and build burning oil pots on the wall that would make an interesting counter… or carry one-time use pots of burning oil from a built upgrade structure somewhere in the keep/tower…

Hmm… I like that… keep upgrade, burning oil reservoir. “F” to interact and pick up a one-time use mini-pot of burning oil.