Valve has officially stopped development on Artifact, its struggling collectible card game based on the DOTA universe. Valve made the announcement Thursday, citing poor player count following the game’s launch in 2018 and subsequent reboot, Artifact 2.0 beta. “While we're reasonably satisfied we accomplished most of our game-side goals, we haven't managed to get the active player numbers to a level that justifies further development at this time,” the Artifact team writes.