Hypnosis is after unlocking villa and the basement in there and summoning succubus.
I am not sure if there is a way to "unlock remu" but you can punish her at the police station. It is the third case of pro-bono assistance there.
If you mean game version, then 60FF is the final version, as for translation you should use the latest one in the github page.
it says insufficient conditions, what do I need to do to meet them? I completed the other two
You mean during the actual training? Try looking through this thread, I remember there being issues with one of them and I haven't gone through this part in a long time so I don't remember if it is unfinished or there is something you need to do.
To unlock the third case itself. I finished the inspector and chief routes, and the other two cases, but I still don't have it unlocked
Did you do the part, where you need to get a 1000 vigilante points? I think this is what unlocks it, but honestly, I don't remember. If you have then tell me and I will have a concrete look.
Have you completed the girls' gang storyline? The one where you go to prison and help Kirishima Rino escape? It looks like you get access to third case by completing this storyline.
I can't really remember this part well, but I would suggest following walkthrough. I think you mainly have scenes in the girls' mansion in suburbs where she can be found in the same room as AIKA.
