Operation Octo from developer Klub Kofta Studio recently shifted the release date to September 10th, to give Hollow Knight: Silksong a little space. This is at least the third time the release date for it has moved, after originally being due in August and then September 5th and now the 10th. Considering that Silksong releases September 4th, it makes sense.
What is it? More info from the dev: "Give an arm to Dr. Odin, an octopus scientist, on his brave journey to stop the evil skeleton army that threatens the marine ecosystem. Strategically place various sea creature turrets as your line of defense, before frantically having to run around and dodge the oncoming onslaught of skeletons. With short, satisfying missions, it's perfect for short-term play or long binge sessions".
The most recent trailer for it is below:

Direct Link
Game Highlights:
- Unlock Turrets: Your arsenal is filled with mechanized sea lives! Those cool inventions (such as Pistol Shrimp, Navy Seal, and Death Ray) will handle the fight. You’ll discover new turret types, one after another – but it’s up to you to determine how best to utilize each of ‘em!
- Skeleton Enemies: Did you know that most humans who ever lived are dead? Tons of skeletons end up in the ocean and are terrorizing local ecosystems. Fight sword-swinging pirates, poison-wielding chemists, and even skeletal dragons. Those skeletons are sure to shake up your play style at every turn!
- Unique Biomes: As you adventure the seven seas, you’ll add more creatures to your turret collection and face new and exciting dangers. Adapting to changing environments is key to survival: don’t misstep into a toxic brine pool or forget your light in the darkness of the deep sea.
- Turret Upgrades: Skeletons will sometimes drop a variety of Elixirs, which you can use to boost turrets into different forms! Will you turn a turret into a frosty ice machine, a powerful mutant, or a shadowy stealth weapon?
- Boss Fights: Special levels featuring larger-than-life boss enemies with formidable abilities!
At release their plan is to have full Native Linux and Steam Deck support out of the box. It will be cheap too at only $5.99 with a 20% launch discount. They've also announced "extensive post-launch support, including free content and a custom level editor".