Haruka at the beginning: I'm only helping because I wanna be alone in peace
And now that he has motivation they're trying to forcibly leave him alone, or to be more specific isolated and under constant watch
This could be a good game, the usual smt gameplay but with added resource gathering and base building, have the alignment system be determined by your base, demons, and some other choice. Call it SMT: Eden Rebuilt
Is it the one where MC is a mage, and the Hero mistreated him like most tsunderes do so he left. Afterwards he discovers he became a sage at some point, beats the hero, but the hero is mind controlled?
Might be this one
Tsuihou no Kenja, Sekai wo Shiru ~Osanajimi Yuusha no Atsuryoku kara Nigete...
This has to be the fastest an ex childhood friend/girlfriend acknowledged that they were very much in the wrong, usually MC has to humiliate them or beat them down before that happens
Another lesson to tsunderes, if you're gonna claim to be in love with them, show it every once in awhile otherwise MC'S will just think you're abusing them