I've managed to get Castlevania Succubus playing and I have to say it's a good game. Although I find it lacking in the upgradeable weapon department.
I've actually almost finished it after about an hour or so playing it, however the final boss was giving me quite a bit of trouble. The only downsides I can see is that the difficulty is a rather unbalanced. Not that it's that hard but there is quite a difference in difficulty when you compare stage 1 with stage 2. The difficulty should be more gradual as the game progresses.
The jumping could also benefit from a bit of tweaking, however since I've played a lot of CV Adventure I have had no trouble getting into the game.
The bosses weren't all hard except for the a couple of them. The strategies to beat them I kinda learned on the fly. That's a first for me. But they were all interesting and original (most of them anyways).
I couldn't rescue all the women unfortunately as almost all of the keys are kept either out of reach, or ambiguously hidden from me. The only key I did find was in stage 1. If there's a walkthrough for all the keys then I'll have to take a look at it before trying my luck again.
Also (not that I really need it (except for the final boss
)) I'd like to try out that cheat code if anyone has it.