The official public release on Steam is scheduled for April 28, 2026 . Key Features:

While official public builds are typically managed through Steam's Library tab , numbered builds like often originate from:

The preview period recently closed in preparation for the public launch.

Unlike Garry's Mod (Lua), s&box uses C# for all high-level systems, including the editor, networking, and UI.

Large build IDs often correspond to specific depot updates on SteamDB.

A game creation platform and engine built on Valve's Source 2 engine.