One rule of physics, held for a thousand rooms.

Consistent physics, escalating consequences

Gravity Station's simulation is deliberately simple and never cheats: pieces slide in the chosen direction until something stops them; pieces stack against each other; nothing has momentum you cannot see. Because the rule never bends, a chamber that looks unsolvable always has a reading you have not found yet.

The difficulty comes from layering objects that interact with that rule in different ways:

• Energy cores — the pieces that have to reach the collectors.
• Blocks and debris — obey the same vector, and are usually the tool rather than the obstacle.
• Laser grids — turn a whole lane into a losing move.
• Portals and wormholes — a piece leaves the board and re-enters it still travelling in the same direction.
• Black holes — remove anything that arrives, permanently.

Move economy

Each stage has a par move count. Clearing it is the puzzle; clearing it in par is a different, harder puzzle about ordering. Undo exists but is limited, so a plan beats trial and error from about stage fifty onward.