海陆空四国大战

One game, three battlefields Secretly deploy 33 land, naval and air pieces in Sea Land Air; contest nine central junctions and curved railways in Classic Four-Nation Army Chess; or face one opponent across Land Duel's 5×13 battlefield. Deduction or custom rules Infer hidden identities from movement, combat and reconnaissance, protect your flags, and capture the enemy's. Hosts can instead reveal every piece and customize rail, sea and air movement limits. Solo and multiplayer Choose from three strategy modes: Sea Land Air, Classic 2v2 Four-Nation Army Chess and 1v1 Land Duel. All three support normal and hard AI plus Steam Relay, LAN and direct-connect rooms. Secret deployment, private per-player views, seat-swap requests and multiplayer replays keep each match complete from setup to review.