Horrific Experiments of the Oyama

Another quiet evening at Oyama's house turned into a total nightmare... The main slacker, Mahiro Oyama, will have to put aside his entertainment and embark on a serious struggle for survival in his own house, which has become full of dangers. Mahiro had to do anything to save and cure his close relative...

Horror sidescroller fangame based on anime and manga «Oniichan wa Oshimai!» (I'm now your sister!) aka «​​Onimai»

VK (Onimai 63) | VK (KI34 GAMES) | YouTube (KI34) | Youtube (Ivan99 Games)

Supported platforms:

• Windows

Developers:​

• Programming and Design: KI34 Games & REMANGA STUDIO

• ​Distribution and promotion: Onimai 63

• Publisher: Ivan99 Games

Special thanks:

• ZXC Kotenok - Ending arts

• ParlemIAm - Music, soundtrack, working with sounds

• Milk K - Financial support

Versions/Updates:

• v 1.0.13 - 8 Jun 2025

Supported languages: English, Russian

#horror #action #adventure #platformer #pointnclick #sidescroller #survival #roguelike #anime #onimai #ki34 #oniichanwaoshimai #fangame