Recently, Crying Suns got released on mobile. The game is a rogue-lite RTS game with a dark story. Price is $8.99 or ¥1,100. Also, it has Japanese language option and got released in Japan from a different publisher. For more details, check out the store pages. Here's a trailer.
iOS (EN): https://apps.apple.com/app/id1511788295
Android (EN): https://play.google.com/store/apps/details?id=com.altshift.cryingsuns
Official Website (EN): https://www.humblegames.com/games/cryingsuns/
iOS (JP): https://apps.apple.com/jp/app/id1514360059
Android (JP): https://play.google.com/store/apps/details?id=com.altshift.orenda.cryingsuns
Official Website (JP): https://orenda.co.jp/publish/game_title/crying-suns/