I love how the environment declares how the player is expected to engage without having to use yellow paint. I mean, the yellow paint is the shadow on the wall, and the scratches along the wall run. But it's not neon, you have to look and understand
Trying to think of other big game changing abilities that also just hit HARD at their time. The portals of Portal. The bullet time of Max Payne. Jumping into any car on the road telepathically in Driver: San Francisco. And yes, even Ubisoft's Assassin's Creed wall climbing felt so good.