Seeking Games with actual hard gameplay

[PaNiq]

Hello, I've been playing Succubus Heaven again for a while after playing it back when it released, and now I'd like to find anything remotely similar in terms of gameplay, like having to find weapons or upgrading your characters and what not in order to actually clear the game or have an easier time. Another game that comes to mind is Karryns Prison, just to give you another game with similar gameplay

 

[Pretentious Goblin]

Haven't played the first game you mention, but here are some games that are challenging and worth a try.

https://f95zone.to/threads/star-knightess-aura-v0-28-0a-aura-dev.76764/ Normal mode is challenging to first-timers, but you don't need a guide. Hard mode is kind of a nightmare.
https://f95zone.to/threads/fear-hunger-v1-4-1-orange.24142/ Unforgiving, unfair and full of RNG, but compelling as a horror game. It's not really a sex-game though. Has 3 difficulty levels and even the lowest isn't easy by a long shot.
https://f95zone.to/threads/corrupted-saviors-release-39g-csdev.63932/ One of the biggest learning-cliffs I've come across in a game.
https://f95zone.to/threads/saria-reclaimed-v0-11-velminth.114058/ - Similar to Karryn.
https://f95zone.to/threads/magician-of-the-olecta-desert-v1-025-barony-sengia.3562/ - Pretty normal dungeon-crawler with some replay value (and avoidable rape/slavery/prostitution). Part of a series.

 

[PaNiq]

Haven't played the first game you mention, but here are some games that are challenging and worth a try.

https://f95zone.to/threads/star-knightess-aura-v0-28-0a-aura-dev.76764/ Normal mode is challenging to first-timers, but you don't need a guide. Hard mode is kind of a nightmare.
https://f95zone.to/threads/fear-hunger-v1-4-1-orange.24142/ Unforgiving, unfair and full of RNG, but compelling as a horror game. It's not really a sex-game though. Has 3 difficulty levels and even the lowest isn't easy by a long shot.
https://f95zone.to/threads/corrupted-saviors-release-39g-csdev.63932/ One of the biggest learning-cliffs I've come across in a game.
https://f95zone.to/threads/saria-reclaimed-v0-11-velminth.114058/ - Similar to Karryn.
https://f95zone.to/threads/magician-of-the-olecta-desert-v1-025-barony-sengia.3562/ - Pretty normal dungeon-crawler with some replay value (and avoidable rape/slavery/prostitution). Part of a series.

Eh I was looking for something a bit less "novel-y". Succubus Heaven is basically hentai dark souls. I've played Saria already but it's way too incomplete to enjoy