Once upon a time there was a card game called Artifact, created by Steam, Half-Life, and Dota juggernaut Valve. This title never performed particularly well, being beset by issues on all sides running the gamut from its approach to monetization to players simply being baffled by its existence. Eventually, all work on the title ceased, it was set as free to play - and that's where the story ended.
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Artifact 2.0 is dead, but both versions of the game are now free for everyone