[Reviewed as of v0.1.9]
Rise of Corruption is a call back to an earlier time in the adult games community, and despite its clumsy start it's a welcome nostalgia trip for people who remember those days. It has relatively weak mechanics, a nostalgia-driven premise, and some simple yet effective porn elements. Folks who are more partial to RPGM games may find something to appreciate here, while those who think the engine gets in the way may want to turn elsewhere.
The porn games community has grown a lot lately thanks to things like RenPy and Patreon. Newcomers might not be familiar with the older community where games were made in flash or RPGM, had more core gameplay elements, and had clearer roots in certain content—JRPGs in this case. Rise of Corruption is a very clear love letter to that old era. The story, the art, the basic mechanics, etc calls back to those early games. Whether or not the game works for you or not may depend on whether you have that nostalgia or soft spot for the old style of games. If you just want a RenPy VN you likely won't see the appeal.
Now, that isn't to say it's all good for people who like that style. There's relatively little thought put into the actual gameplay, with even bosses being easily wiped out without any planning or effort. Maps are relatively empty, and while a certain amount of walking is welcome in RPGM games RoC overdoes it. Half the maps could easily be discarded without jeopardizing the feeling the game is going for. It's hard not to compare RoC to one RPGM game in particular, which has been going since that time and has had a great deal of thought put into how to tie the RPGM mechanics into a porn game in a satisfying way.
The actual porn is decently done if you're into what it's going for. The visuals are an older lower-res style which you might like or dislike, and the porn follows a simple but effective trainer/corruption style. There's room for some more content—every character thus far follows just about the same progression, to the point where large parts of certain corruption events are just copy+pasted (e.g. the escape events). It would be nice to see the characters branch out a bit more in terms of both personality and porn scenes.
Overall RoC isn't anything special, but I appreciate seeing a new dev dive into one of the more neglected sectors of the porn community. I'm optimistic that with some more time and effort the dev can work on some of the game's weaknesses and turn this into a great tribute to an old genre. While it certainly isn't the top game or VN I've found on f95, I look forward to checking in again in a while and seeing how it's going!