Unity Multiplayer for Mobile & WebGL2

This skill guides you through building real-time multiplayer Unity games that ship to both mobile (iOS/Android) and WebGL2 browsers. The two primary server frameworks covered are Colyseus (automatic state sync, room-based) and Nakama (full game backend with auth, storage, matchmaking).

Decision tree — start here

1. Choose your server framework

Pick Colyseus when:

• You need automatic state synchronization (schema-based binary deltas)
• Your game is primarily room-based (lobbies, matches, sessions)
• You want the fastest path to a working prototype
• You'll handle auth/storage/leaderboards yourself or don't need them

Pick Nakama when:

• You need built-in authentication (device, email, social, Steam)
• You need persistent storage, leaderboards, tournaments, friends, groups, chat
• You want a production-grade backend from day one
• You're comfortable with manual state management via opcodes