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An American video game developer.

For the device, see valve.

Products developed

Games

• Half-Life (series)

•• Portal (series)

• Counter-Strike
• Day of Defeat
• Team Fortress 2

•• Team Fortress Classic

• Left 4 Dead
• DOTA 2
• Deadlock (game)

Other products

• Steam (platform)
• The Orange Box
• Source Filmmaker (medium)
• Steam Deck

See also

• Garry's Mod