If Gordon Freeman was in Smash (or another platfighter) I think that a Garry's Mod player would be a really good echo fighter for him. The weapons in Gmod are literally just the weapons from Half Life 2, so you'd pretty much only have to code in an item-spawning move, a couple of props, maybe change a couple of visuals, and you've already got a pretty good fighter. While a fully-unique fighter would still be cool, this could still be a pretty easy and faithful way to represent Gmod.
