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The Source Filmmaker (SFM) is the movie-making tool built and used by us here at Valve to make movies inside the Source game engine. Because the SFM uses the same assets as the game, anything that exists in the game can be used in the movie, and vice versa.
Multiplayer Only
Solo Only
Unsupported
Keyboard & Mouse
Crowdsourced campaign length, extra objectives, and 100% completion metrics
Session-Based / Party Multiplayer
Designed for dynamic rounds, party matchmaking, and infinite multiplayer replayability. No fixed linear campaign duration.
Official high-resolution media gallery (6 screenshots)



Available game editions, collector bundles, Supporter Packs, and downloadable expansions
Live pricing across official digital stores, historical lows, and subscription catalog availability
Honest player critiques with verified playtime and karma upvoting
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Troubleshooting guides, build recommendations and accepted solutions
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Key directors, leads, and game development studios