There was a game that has vexed me for decades. Id posted about it in the past and gotten nowhere. But seeing this post made me do some new searches and i actually found it. My memory of it was: very old mac os game where youre interacting with the environment and often dying, and the scene i remember is some kind of evil rabbit, you defeat it and it opens up a portal into some other place and youre wandering a surreal castle. It is in fact: radical castle. The funny thing is in the past the description always lead people to suggest the manhole and id have to squint and question if somehow that scene was in there somewhere because they do look similar and there is a rabbit. But nope its radical castle.. im going to see if i can play it somehow.