Steam is green again on its 20th anniversary - Engadget
- Steam is green again on its 20th anniversary Engadget
- Steam just turned 20 years old, and Valve is celebrating The Verge
- Steam Kicks Off Big Sale to Celebrate 20th Anniversary GameRant
- Steam reverts to original 'army green' for 20th anniversary PC Gamer
- Steam just turned 20, and we're getting the gift of cheap games PCWorld
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