Demon Slayer: Kimetsu no Yaiba – Hinokami Keppuutan is a “demon-slaying battle action” game for PlayStation 4 due out in 2021 in Japan. Its developer is unknown. The game follows the story from the manga, and is seemingly a title where players become Tanjiro Kamado and relive the original story. The official website will be available here.
Demon Slayer: Kimetsu no Yaiba – Keppuu Kengeki Royale is a free-to-play “asymmetrical battle-style survival action” game developed by Soleil for iOS and Android. Its release date was not announced. Battles between Demon Slayers and demons will occur on maps that reproduce the world of the manga.
Weekly Jump does not have screenshots of either game.
Update 03/15/20 at 10:05 p.m.: Get the official announcement here.
Update 03/15/20 at 11:15 p.m.: Added high-resolution scans.