In celebration of 25 years of the Megami Tensei series of games, Atlus has released a Metroidvania-style game called Shin Megami Tensei: Synchronicity Prologue. The game is available now as a free download for PC. If you want to give it a go you’ll have to be quick, as the game will only be available to download until December 24. You can get it from the Atlus website.

Shin Megami Tensei: Synchronicity Prologue is a side-scrolling action game that was recently revealed during the latest trailer for the upcoming 3DS title Shin Megami Tensei: Deep Strange Journey, which is due to be released in Japan on October 26. Synchronicity Prologue was developed by Den-fami Nico Game Magazine’s Ladybug team, which had previously developed the PC game Pharaoh Rebirth+.

In Synchronicity Prologue, players take on the roles of Jack Frost and Jack Lantern as they make their way through the mysterious Black Forest Barth. The trailer shows off a number of environments that look like they’ve come straight out of the 2D Castlevania series, and that’s no bad thing. I will warn you though, it’s all in Japanese, but the action that takes place seems to be fairly self-explanatory.

Shin Megami Tensei: Deep Strange Journey will be released on the Nintendo 3DS in Japan on October 26. A release will follow in North America and Europe in early 2018.