Steam is green again on its 20th anniversary

In the world of console video games, Microsoft, Sony and Nintendo stand as titans. Its distribution platform, Steam, may not be the only place to buy and play games on the PC, but it's easily among the largest, oldest and most iconic. Today marks Steam's 20th anniversary. Valve is celebrating by slashing prices on its self-published games, offering most of its catalog for 90 percent off, except Half-Life: Alyx. The sale's landing page doubles as a cheery retrospective of Steam's last two decades.