Artifact is a digital collectible card game developed and published by Valve Corporation. The game focuses on online player versus player battles across three boards, called lanes, and is based upon the universe of Dota 2, a multiplayer online battle arena game also from Valve. Artifact was designed by Magic: The Gathering creator Richard Garfield, and allows for the buying and selling of cards on the Steam Marketplace. The game was released for Microsoft Windows, macOS, and Linux in November 2018, and is planned for Android and iOS devices the following year.