Build up your deck until the retail game is released.

Digimon Universe: Appli Monsters Cyber Arena will launch via the Nintnedo eShop as a free-to-play title on September 21 in Japan, Bandai Namco announced.

The game will let you experience the opening parts of the upcoming retail game—Digimon Universe: Appli Monsters—which is yet to be dated. You’ll also be able to battle your friends, and by playing the game every day, you’ll be able to obtain various items. When the retail version releases, save data from the free-to-play game will be compatible. There is no limit to the amount of times you can play the free version, so you can play every day until the retail game launches to build up a powerful deck. Appmon Chips are also compatible.

The game’s official website also offers details on its characters:

You (Boy or Girl) A second-year student at Hifumigoaka Middle School who can be a little hot-blooded. His Buddy Appmone is the online game app Appmon, Onmon. With his Appli Drive in hand, he’ll meet, battle, and train various unseen Appmon, while unfoling a grand story. Rival Your childhood friend, Naoto. You played with him often as a child, but recently he has drifted away. His buddy Appmon is the offline game app Appmon, Offmon.

If you missed it, catch the game’s debut trailer here. View a new set of screenshots, including the box art for the retail 3DS game, at the gallery.