OpenBack — Online Territorial War and Strategy Game

OpenBack is a browser-based territorial war and real-time strategy game where players expand nations across a world map, manage troops and gold, build military and economic structures, form alliances, and conquer rival territory.

The game combines nation building, country conquest, geopolitical strategy, diplomacy, economy management, empire expansion, military planning, and world domination with fast .io-style territory control. Its evolving gameplay includes solo nations, online multiplayer, ranked competition, armies, aircraft, tanks, ships, missiles, and defensive infrastructure.

Play solo against computer-controlled nations, host or join private multiplayer games with shareable lobby links, or enter ranked 1v1 matchmaking against another online player. OpenBack runs directly in a modern desktop or mobile web browser without a download.

OpenBack game features

Play OpenBack online. OpenBack tutorials. OpenBack development blog. Privacy policy. Terms of service.

← All tutorials
Tutorial

How to Play OpenBack Multiplayer with Friends

Create a private OpenBack lobby, share its game URL or ID, and help friends join the same multiplayer match.

Host a private lobby

Choose Host Multiplayer, configure the match, and create the lobby. Keep it open while friends join. The host controls the settings and starts when everyone is ready.

Share the complete lobby URL

Copy the full game link and send it to your friends. The game-specific part at the end tells OpenBack which lobby to connect to. A homepage-only link cannot identify the private game.

Join with the game ID

Players can also choose Join Multiplayer and paste the lobby ID. If joining fails, confirm that the lobby is still active, copy the ID without missing characters, and ensure the browser is not blocking WebSocket connections.