The Player is a strange entity in the OFF world, and a stand-in for the player character of the game themselves. They seem to be an ectoplasmic entity capable of taking control of hosts as "uses" them to play through the game. They can seemingly only be seen by a few characters.
Powers and Stats
Name: Varies. Often referred to as "Puppeteer"
Powers and Abilities: Flight, Possession, Non-Corporeality, Invisibility, Breaking the Fourth Wall, Time Manipulation, Information Manipulation, Reality Warping, Resistance to Mind, Soul, Spatial, Void, Time, and Information Manipulation, as well as to Reality Warping
Attack Potency: Unknown physically. Varies from Star level to Solar System level physically by possessing The Batter or The Judge (Can control The Batter or The Judge, and use his powers). Low Multiverse level with reality warping (Can split the OFF world into multiple timelines, and can completely control up to sixteen different save files. Since the various game files are canonical constructs within the game's story, each save file corresponds to its own timeline.)
Speed: Unknown. Possibly Omnipresent within the game. Varies from Speed of Light to Massively FTL reactions/combat speed via controlling The Batter or The Judge (The characters in question can attain these speeds)
Lifting Strength: Unknown
Striking Strength: Unknown
Durability: Unknown. Non-Corporeality makes them hard to kill. Varies from Star level to Solar System level physically, while possessing The Batter or The Judge
Stamina: Unknown. Likely Limitless with The Batter or The Judge
Intelligence: Unknown (Varies from player to player, though in-canon they successfully solve all of the game's puzzles)
Weaknesses: Doesn't seem to have full control of their "puppets."
-Possession: The Player can take control of "puppets", and use them as an avatar to fight with. However, both The Batter and The Judge: both of the characters that The Player has ever possessed: have demonstrated that they can act independently of The Player if they wish to.