Honestly, I'm not sure if Revalations is crackable, I'm not like super-technically proficient or anything so maybe I'm completely wrong. Just take everything I say here with a grain of salt I guess.
From what I see, the game uses Unity WebGL player. The initial load includes a Unity bundle (.unityweb) file that contains the main menu CG, the buttons, the scripts, the font, and the audio -- which I was able to extract. After that, they make it difficult... As you're playing along, for every CG / scene that you see, it has to request it from the server, which then loads it into the game. It only has to load it once for every playthrough since it is saved in your cache, and then automatically deleted(?) after you close or refresh the page.
Although the game is like broken up this way, I'm still able to rip every CG that I see. I can't rip any ones I haven't seen. I'm not sure if the CG is kept in loose files or if it just extracts it from another Unity bundle on their server. I've played the game hundreds (exaggeration) of times, and am still missing a couple scenes so I have an incomplete CG collection.. Anyway, I was thinking maybe if I had all the CGs, the files can be re-bundled and re-scripted to make the game work or a virtual server can be created or something like that.