Mansion is a strange game. It has all the components that could make a fun H-experience but it falls short in almost all of them - the protagonist is hot, the setting is creepy, there's puzzles and there are monsters, and with ammo scarcity it should be hard, but none of that materializes.
The gameplay isn't anything new. Your scantily clad character walks around some haunted monster-infested mansion looking for some things. During this exploration, you run into monsters and now have to escape with some data. The map is kind of confusing. You're never sure exactly where you are and this is worsened by the fact that there are so many doors that open over time and you don't know if you've been to a certain place or not. Honestly, I finished the game in thirty-ish minutes on normal and most of it was spent walking around looking for where to go. The puzzles themselves aren't difficult either. The gunplay is fine. The entire game just feels incredibly limited. There's not a lot of guns, not a lot of monsters and not a lot to do.
You'd hope with the titillating title-screen that the H-Scenes are better. The sprite ones are censored with a big ol' black circle and you aren't that great to look at. The game over scenes are just a single image which while nice, isn't amazing. And that kind is it.
You can play it if you're looking for a quick thirty minute foray into an ACT but I probably wouldn't The game isn't fun and the H-Scenes aren't amazing. Honestly, the title screen is the best thing about it. That slow rhythmic breathing is sexy.