Kick-Ass and Gamegate have come together to announce the mobile version of Tensei shitara Slime Datta Ken (転生したらスライムだった件).
Nothing about the game has been revealed yet and there is no release date announced. What we do know is that there will be an Anime series coming this Fall (Q4 2018).
I haven’t actually read the Light novel or Manga myself but judging from the comments you guys made on my Facebook Post, I guess I will be binge reading this tomorrow!