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About Concrete and Steel

Concrete and Steel is a 3D sandbox where you build structures from a wide range of objects and materials. You can create alone or with friends and other players, using a blank canvas, building tools and customisation options.

Build and customise

Create free-form blocks, spawn props, paint surfaces and wire elements together to make your structures work. Building follows a fine 10 cm grid, allowing detailed structures to align precisely. The game includes a range of structural and decorative objects, as well as large environments to build in.

Multiplayer building

Take your sandbox online to build with friends. Server administrators can use tools such as password-protected building and private servers.

Mods and custom content

The Modding SDK lets you create and share custom objects and paints using freely available, cross-platform software. Mods are supported in multiplayer.

Frequently asked questions

Steam lets publishers create keys to sell in other shops. Once you activate a key, the game is yours to keep, just like a store purchase.

Disclaimer: CD keys have an inherent 1–2% average failure rate. Check the shop terms for buyer protection info. Steam offers no buyer protection for keys bought in other shops and doesn't refund them.

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