Currently on GoG.com – and coming to Steam once Valve approves it.

From Lori & Corey Cole:

Today is the day! Hero-U: Rogue to Redemption is now live on GOG at https://www.gog.com/game/herou_rogue_to_redemption. Steam coming soon – we’re just waiting for Valve to approve the game app. I’ll post again when the Steam page is live.