Earthbound

One of the things different about that venerable old classic Doom versus today's shooters is that you couldn't jump. (Also, there was never more than one vertical level; you couldn't have rooms under other rooms. The engine just didn't support it.) While this would no doubt feel very strange and constricting to a person used to modern shooters (Guild Wars also doesn't let you jump, which did indeed feel very strange last time I played) , it did have one advantage: when you hit a ledge, you knew that you couldn't get over it. There was no "oh, maybe if I press forward at just the right time, or maybe hold down crouch while I jump." There was also no "maybe I can jump from this crate to this one if I press spacebar at just the right time." You could either go there or you couldn't. No ambiguity, and no jumping puzzles. Gordon Freeman is, after all, not Super Mario.