Direct answer
Wanderburg is in Steam Early Access, its currently confirmed native release is for Windows, and the official store describes it as single-player. These facts were rechecked September 11, 2026.
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Current release state
The playable Early Access version launched September 8, 2026. The current build contains the moving-castle loop across multiple biomes and difficulty levels, while balance and content remain subject to change.
Choose the fact you need
Use the ordered directory for release timing, Steam, Steam Deck, console status, US pricing, Chinese language support, or the official Discord.