Voidrun is a rogue-lite with fresh ideas. To kill enemies, instead of shooting them with a pistol or some other weapon, you surround them with orbs called void balls to break the enemy and the ground underneath them. This kind of system has only been used a couple of times to my knowledge; Qix, an old Atari arcade game, and Pokémon Ranger for the DS. Voidrun does this mechanic very well and really changes up the tired and oversaturated rogue-lite genre.
Source: N4G PC Voidrun review – ChristCenteredGamer