Valve has announced a new game. No, it's not that one.

The game is Artifact: The Dota Card Game and it is, as you might imagine, a collectible card game spin-off from the hugely-popular Dota.

The full game launches at some point in 2018 for platforms unknown, according to this fairly vague teaser:

Artifact Teaser Watch on YouTube

Already, Artifact is drawing comparisons with Blizzard's Hearthstone, which was itself a spin-off from the World of Warcraft universe.

It's a busy time for the card-collecting genre. There's Gwent, CD Projekt Red's spin-off from The Witcher, Bethesda's The Elder Scrolls Legends, Mojang's Scrolls and all manner of others.

One thing we do know about Artifact is that ex-Double Fine developer Brad Muir is leading the project.

I've been working on @PlayArtifact at Valve for a while now! Can't wait for you guys to play it! :D!

— Brad Muir (@MrMooEar) August 9, 2017

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Muir's career at Double Fine stretched back to 2005's Psychonauts, before he became project lead on tower defense title Iron Brigade, Amnesia Fortnight prototype Brazen and then turn-based strategy release Massive Chalice.