OFF is a free indie game developed by Mortis Ghost in the RPG Maker engine. It has become exponentially more famous than most other games on the engine, to the point of being an inspiration for such games as Undertale. It is centered around the "purification" of various zones and the fulfillment of The Batter's ultimate quest, the turning "Off" of the game. Very much is open to interpretation within the game.
Power of the Verse
Exceptionally powerful, as the absolute lowest combat tiers extend to about building level whereas the highest are potentially universe level (although they can solidly be called at least Solar System level). There are many hax abilities (including regular abuse of Concepts and the ability to interact with Non-Corporeal beings, as well as all Guardians maintaining the ability to turn energy to mass easily, to name a few) and at least a few of the characters are capable of breaking the fourth wall (including Zacharie, The Judge, and The Batter himself).
For more information on the feats and power of this verse, go here.