https://www.kitguru.net/gaming/matthew-wilson/valve-releases-dota-underlords-in-open-beta/
 
Just a few weeks ago, Valve announced that it was working on its own version of Dota Auto Chess after having conversations with the original modders behind the game mode. As we expected, this new Dota spin-off is called Dota Underlords and surprisingly, Valve has the game ready and playable already in open beta form. With Artifact last year, Valve held lengthy closed alpha and beta tests, keeping the group of testers small and releasing very little information to the public until the weeks before launch. Then, Artifact launched to a disappointed fan base and the game quickly lost the players it did manage to bring in. This time around, Valve is taking the opposite approach by widening the group of closed beta testers, with an open beta test set to arrive next week.