Join the Slayers Unleashed Roblox Group first to redeem codes for Slayers Unleashed. Launch the game after joining the Slayers Unleased Roblox Group. Then select the Chat button.

The Demon Slayer anime is just the start of content inspired by the original manga, as there is a full-fledged game on Roblox called Roblox Slayers Unleashed, which heavily derives from the series.