Subnautica is now available through early access on Steam, offering an under water adventure game from Natural Selection developer Unknown Worlds. A new trailer celebrates the news, and the team offers reassurances that the game is already in a playable state, and that develop will continue going forward:

Early Access? Does this game even run?
You bet it does. Subnautica has been in development for about one year. Over the last two months, a group of Special Edition customers has been playing Subnautica. Their feedback has allowed us to ensure that Subnautica is not just an 'Early Access Game,' it's actually a 'game' as well.

Will Subnautica ever be updated?
For the past two months, we have released a 'stable' update every single week. Further, customers that want 'more' development updates can opt in to 'Experimental' builds, which are release twice every day. 45% of Special Edition players chose this option. We have no intention of slowing down in Early Access.

What now?
Early Access is a nucleus around which a better, bigger, and more fun game can form. Lots of the core elements of Subnautica gameplay are already in place. Over time the world will grow larger, deeper and more striking, creatures more diverse and intelligent, loot, crafting and vehicle construction more comprehensive, the story more fleshed out, and ecosystems richer and more vibrant.

Large submarines, new unique life forms, and fantastic environments are all in production and will be introduced to Subnautica Early Access in updates.