Hole.io drops you into a miniature 3D city as a tiny black hole. Everything in the environment is a potential meal — street lamps, park benches, pedestrians, cars, trees, and eventually skyscrapers.

The game uses real-time physics: objects topple and slide into your hole based on their size relative to yours. If something is too large, it blocks your opening and slows you down, so growth order matters.

The core loop is simple but competitive: move through the city, consume objects to increase your hole's diameter, and outgrow rival players before the match timer expires. In Classic Mode, the largest hole at the end wins.

In Battle Royale, you need to swallow other players to be the last one standing. Matches last around two minutes, which creates an intense land-grab where every second of efficient pathing counts. The quick restart loop and leaderboard rivalry make it hard to play just one round.

There are no attack buttons — your hole automatically swallows anything it is large enough to consume on contact. Grow your black hole by consuming city objects and outsize every other player. Your score equals the total number of objects consumed.

In Classic Mode, the biggest hole when the timer hits zero wins. In Battle Royale, eliminate all other holes to be the last one standing. Your hole starts at size 1, only able to swallow small items like trash cans, fire hydrants, and street poles.

As you eat and grow, you unlock the ability to consume progressively larger objects: Oversized objects that do not fit will sit on top of your hole and block further consumption until you grow enough or move away. Power-ups spawn randomly on the map during matches.

Confirmed power-ups include Speed (faster movement), Magnet (pulls nearby objects toward you), Shrink (reduces rival holes), and Get Bigger (instant size boost). Between matches, you earn experience to level up and unlock animated skins — 13 total across all maps.

The game features 6 unique maps, each with a different layout and object distribution.