Gravity Four

An original seven-column, six-row gravity game. Select a column, then release Drop. A token lands in the lowest free cell. Four horizontally, vertically or diagonally wins; a full board without four draws. Full columns, out-of-turn actions and moves after the finish are refused. The seeded first player is visible.

Solo plays one human against a bounded public-board search bot. Hint searches the position, selects a column and never drops for you. Solo-only Undo returns to before your last move and the bot response. Ten tactical puzzles ask for an immediate winning drop and count hits and misses. Local play is exactly two humans taking turns, without unilateral Undo.

Online is exactly two signed-in humans. Move histories are replay-validated, with match epoch, sequence and legal turn checks. A 30-second turn clock forfeits. Results are casual and host-managed, unverified. Backgrounding or connection loss aborts without a result; there is no ranked anti-cheat, live reconnect or host migration. Help keeps online play live.

Display-sized board geometry keeps circular tokens proportional to the whole board on desktop, mobile and fullscreen. The engine redraws changes and falling tokens while fixed updates and networking remain active. Original synthesized audio, separate keyboard/touch actions and English/Brazilian Portuguese help.

• Blue: A/D select, release F to drop, H for a hint
• Coral local: left/right select, release Enter to drop, Right Shift for a hint
• Touch: select a numbered column, then the separate Drop button
• Undo is solo only; Escape pauses solo/local; M mutes
• Portrait recommended; landscape supported