Uranium is a passion project by fans ~JV~ and Twitch. Just like real main series games, players must navigate through a region, called Tandor, packed with new Pokemon and gyms in their quest to become the Tandor Regional Champion. Unlike regular Pokemon games, though, Uranium features a mystery at the heart of its narrative involving the player’s mother, who died in a nuclear explosion many years ago.

The game also features a new feature called Nuclear Type, which can corrupt Pokemon and cause them to sometimes attack the trainer. The benefit of using a Nuclear type? It resists and is super effective against 12 out of the 19 types present in the game, making them powerful foes in battle.

The game became available for download August 6, though the website has been up and down since then due to huge amounts of traffic. You can follow its Tumblr page for live updates and a link to download a mirrored version.

Even though the game is free, it’s likely Nintendo will shut the game down due to copyright issues, so grab it while you can!