Duelyst

Duelyst is a free and open-source digital collectible card game and turn-based strategy hybrid developed by Counterplay Games, who initially self-published the title but was later published by Bandai Namco. It had been released in an open beta period in 2015, and the full game was released on April 27, 2016. Due to declining player counts, servers for Duelyst were shut down on February 27, 2020.