Why not just get the regular version

Will it need a patch or something?

I beat it in a full playthrough last year, and now that the full launch is coming up this year, I'm getting ready to replay the whole thing. I'd absolutely love to see an achievement system here to make replaying it an absolute blast.

So I've already purchased this at the time on the DLsite, but it's great to have the possibility to have it in our steam libraries. Although I assume it will need a patch to play the full thing, which is making my OCD shaking. Any chance that we can get this released on GOG as well where the patch won't be needed?...

I will gladly buy it again for my collection on Steam :)