Given the sheer quantity of games releasing on Steam these days, having a neat little elevator pitch for your game can be vital in helping it stand out. For example, if I get an email saying a game is like "Obra Dinn meets such and such" or "Into The Breach but a deckbuilder", that's like personal catnip to me, and can be a handy indicator of whether I should investigate further - maybe watch a gameplay trailer for it, say, or see if it's got a demo. Case in point: this is exactly how I stumbled upon the upcoming Donkey Kong Country-esque platformer Windswept last week, although instead of an email, I saw it on the growing "Your game is too much like..." thread over on Xwitter - which is definitely worth a browse if you have very niche interests in need of a good scratch.