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SOURCE 2 · C#
Build and play games with s&box.

Facepunch's game engine and creation platform — make games in C#, or jump straight into community games.

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s&box Wiki

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Tools & Community

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NOT AFFILIATED WITH FACEPUNCH STUDIOS · © 2026 s&box Wiki (community)
Docs/Media
Media

Media

s&box supports video playback, audio streaming, music, voice chat, positional 3D audio, and video encoding.

See Video and Audio for more details.

Codec & Format Support

Video

CodecFormatsEncodeNotes
VP9.webm, .mp4Yes
AV1.webm, .mp4YesBest compression and quality
WebP.webpYesSupports transparency
H.264.mp4NoWindows only via Media Foundation, not recommended

Audio

CodecFormatsNotes
Opus.ogg, .opus, .webm
Vorbis.ogg, .webm
FLAC.flac
MP3.mp3
WAV / PCM.wav
AAC.mp4Windows only via Media Foundation, not recommended

:::warning H.264 and AAC are only available on Windows via system decoders. Use VP9 or AV1 for video, and Opus, MP3, FLAC, or WAV for audio. :::

Source: Facepunch/sbox-docs (CC-BY-4.0) · updated 2026-04-22. Read it rendered on the official docs.

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Community wiki — not affiliated with Facepunch Studios. For the latest and most authoritative information, see the official developer wiki.