In Onager each player tries to reach the opponent's back rank. Onager is named after a Roman siege engine that is a type of catapult, as the way the pieces move resembles how projectiles are hurled forward with this device.

Inventor: Néstor Romeral Andrés

See BoardGameGeek: Onager. Hex-hex board with a neutral obstacle in the centre. Pie rule. Superko is forbidden.

No active board-size variants in the engine.

• Current engine version: 20260806 (2026-08-06). Superko banned and pie added. On Abstract Play since 2024-02-01.

• https://boardgamegeek.com/boardgame/131047/onager