5) FTL
Thank Kickstarter funding for allowing one of the best roguelikes ever come to fruition. It differs from the genre extensively; normally roguelikes are smothered in fantasy fiction. FTL is All Spaceships, All Sci-Fi.
Command a growing crew in an attempt to move across the galaxy to get help fending off against a rebel warship, gradually gain better weaponry, abilities, power sources and the crew to make everything function. The unfair difficulty and different starting ships mean near limitless replay value.