While the PlayStation 4, Xbox One, and Switch versions are listed with an October 30 release date, the PlayStation 5 version is listed with a December 31 release date. Since an official western release date other than fall has yet to be announced, both should be considered placeholders.
Undernauts: Labyrinth of Yomi first launched for Xbox One in June 2020 in Japan, followed by PlayStation 4 and Switch in October 2020. It will also be available for PC via Steam when it launches in the west.
Western publisher Aksys Games will host a games showcase event called “All Aksys” on August 6. If a PlayStation 5 version of Undernaughts: Labyrinth of Yomi exists, it will likely be announced there alongside a final release date.
Here is an overview of the game, via Aksys Games:
When a massive, mysterious structure suddenly rises from the ground, the government sends a team to investigate. You have been selected to join an elite group of underground explorers employed by Cassandra Company. Unfortunately, you are not the only one searching these caverns. Terrifying monsters lurk in the shadows. Dangerous criminals hunt for resources. Large numbers of people are missing. The test of your survival skills begins now…
A new generation of explorers flock to the colossal superstructure, Yomi, in hopes of striking the “mother lode”.
Cut through the walls and create your own path as you battle for your life in the depths of Yomi.
The ultimate test for survival is found in the labyrinth. Terrifying monsters lurk in the shadows. Criminals with mysterious powers are out to thwart your efforts. Can you be victorious and rise above the shadows?