Single-player games like Drain Mansion
Below are 9 single-player Steam games similar to Drain Mansion, ranked by player overlap. Every pick carries Steam's Single-player category, so multiplayer-only titles or always-online games don't sneak in. imho.run pulls the category data from Steam directly — Single-player here matches what the store labels.
Want the full alternatives list (paid + free + Steam Deck + cheaper picks)? See the parent games like Drain Mansion page.
Ranked picks
- 1
Succubus Affection
Single-player alternative to Drain Mansion — playable solo, no multiplayer required.
In a world of human-like monsters, a young man lives in a quiet, remote village with his sister. However, he is attacked by monsters when he leaves the village. Now he works hard to become stronger so he no longer burdens his sister.
- 2
FlipWitch - Forbidden Sex Hex
Single-player alternative to Drain Mansion — playable solo, no multiplayer required. Shares Action and Adventure with Drain Mansion.
Use your newly-acquired genderbending abilities as a 'FlipWitch' to conquer evil monsters, giant bosses, and Monster Girls across the land! You'll have to use your wits in this quirky adventure to seduce everyone around you!
- 3
Eroico
Single-player alternative to Drain Mansion — playable solo, no multiplayer required. Shares Action with Drain Mansion.
Eroico is a colorful, lighthearted platformer with monster-girls and sexual content. Journey across the land, battling and escaping the grasp of monster-girl foes in your quest to defeat the demon lord!
- 4
Future Fragments
Single-player alternative to Drain Mansion — playable solo, no multiplayer required. Shares Action and Adventure with Drain Mansion.
Travel to a threatening future and seek the fragments of a powerful weapon to defend your kingdom. Future Fragments is an adults-only, modern take on a platformer with genre-mixing gameplay, English voicework and a branching storyline with choices that actually matter.
- 5
Midnight Castle Succubus DX
Single-player alternative to Drain Mansion — playable solo, no multiplayer required. Shares Action and Adventure with Drain Mansion.
A succubus issues threats against humanity once every 100 years. While men die and young women disappear one by one, a succubus hunter visits a cursed city under the moonlight. Let's rescue abducted girls and defeat the succubus!
- 6
Scarlet Maiden
Single-player alternative to Drain Mansion — playable solo, no multiplayer required. Shares Action and Adventure with Drain Mansion.
Join Scarlet, the last remaining Maiden of the Sacred Flame, in her sinful quest to defeat the Prime Evil. Explore the randomly generated dungeons of the Underworld, learn new abilities, equip Scarlet with powerful equipment, and engage in lewd activities along the way.
- 7
Vampire Mansion
Single-player alternative to Drain Mansion — playable solo, no multiplayer required. Shares Action with Drain Mansion.
Explore the mansion, find a way to fight the vampires, find the key, and escape the mansion.
- 8
Parasitic Evil
Single-player alternative to Drain Mansion — playable solo, no multiplayer required. Shares Action and Adventure with Drain Mansion.
Amidst a catastrophe, the protagonists find themselves trapped inside a hospital that has been conducting mysterious research. While they manage to survive the initial disaster, they are soon confronted with insane mutations—and the struggle to escape the hospital which leaves both their sanity and physical forms under siege.
- 9
Cycle of Corruption
Single-player alternative to Drain Mansion — playable solo, no multiplayer required. Shares Adventure with Drain Mansion.
Welcome to the age of hysteria, where a doctor finds himself in the confines of an asylum riddled with monsters of an unknown world. Resist their temptations to uncover the mysteries surrounding the institute... or succumb to the darkness within.