Build together. Survive together.
Builder is a cooperative survival and base-building game for one to four players, inspired by Valheim and built in Unreal Engine.
In development
What it is
Gather what the world gives you, raise a base that holds, and keep it standing with up to three friends. Structures are placed piece by piece and snap together into foundations, walls, and floors that persist for everyone in the session.
Features
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Co-op for 1–4 players
Play solo or with up to three others in a shared, persistent world.
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Piece-by-piece building
Place foundations and structures with live previews and socket-based snapping.
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Server-authoritative multiplayer
The host resolves world state, so what you build is consistent for every player.
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Built in Unreal Engine 5
Developed on Unreal Engine 5.8 using its Iris networking stack.
Epic Online Services
Builder uses Epic Online Services for two things: signing in with your Epic account through the Epic Account Portal, and connecting players to each other for multiplayer sessions.
Sign-in is handled by Epic. How Epic processes the information involved is described in our privacy policy and in Epic's own privacy policy.