Screenshots
Watch trailer on Steam ↗Hamachi the Psychotic Killer
gavinoriley · Published by gavinoriley · Official site ↗
Content notice: This Game may contain content not appropriate for all ages, or may not be appropriate for viewing at work: General Mature Content
Positive — 89% positive (35 reviews)
Last updated 2 Oct 2026
The platformer game where you can play as the BAD GUY. (or the good guy)
£8.50
Lowest price we've ever recorded
View on SteamPrices can lag the live Steam store — always confirm before buying.
Price history
Action, Indie · 2026 · More £5 - £15 games
Explore the twisted world of Hamachi the Psychotic Killer, an action-packed indie adventure from gavinoriley, where your role as the antagonist drives the narrative forward in a platformer that challenges conventional heroes.
About this game
In this platformer, you control a piece of tofu named Hamachi, who unexpectedly falls into the possession of Demon Queen Deity, an evil fiend who intends to use him as a vessel to conquer the world through mass murder.
features:
Play as the villain: Choose to kill, spare, or ignore every civilian.
Three distinct routes: Pacifist, Neutral, and Genocide, each with its own ending.
Defeat or pacify demonic bosses, pacified bosses will join your side.
Journey through 8 visually distinct worlds built with original pixel art.
Chainsaw power-up, The Psycho Saw, grants temporary invincibility and destroys any being you touch.
Collect souls from dead civilians or sushi dropped by Penelope Pom Pom Pink to restore health.
Your crimes will not go unnoticed by the authorities.
System Requirements
Will my PC run this? →Minimum
- OS *: Windows 7 or greater
- Processor: demonically charged doom engine
- Memory: 666 GB RAM
- Graphics: integrated soul glyph renderer
- Storage: 200 MB available space
- Sound Card: any cursed audio device
- Additional Notes: may summon minor poltergeists
Recommended
- OS *: Windows 7 or greater
- Processor: sixfold sinner engine
- Memory: 666 MB RAM
- Graphics: abyssal glyph accelerator
- Storage: 400 MB available space
- Sound Card: void-tuned sonic apparatus
- Additional Notes: may summon hamachi, idk srry
Supported Languages
Latest news
Patch NotesOfficial
1.2 patch
Changed the outcome of the Neutral ending to better reflect the character's terrible fate.Minor boss mechanic adjustments.Aesthetic updates to the title screen terrain and characters based on the real-world calendar.Read full article on Community Announcements (gavinoriley)Patch NotesOfficial
1.1 patch
Gameplay• Reduced damage for most enemies and bosses, essentially increasing Hamachi’s hp from 6 to 12,• Increased Hamachi’s attack hitbox size from 8×8 to 10×10 (width/height)Bosses• During the first two boss fights, if the player drops to 2 HP, Penelope will spawn from either corner of the arena and provide Hamachi with sushi to restore health. This can occur once with each encounter. UI• Levels containing enemies should now display a counter showing:- Total enemies in the level- Number of enemies defeatedRead full article on Community Announcements (gavinoriley)Patch NotesOfficial
🐛 patch
Fixed a bug where the kill counter reset to 0 after dying on World 5/6 stage 1 if the game was previously exited on that level.Removed decorative ceiling spikes in the first dungeon that caused a crash when touched. (lol)Made slight adjustments to the pacifist/neutral final bosses.Read full article on Community Announcements (gavinoriley)AnnouncementsOfficial
Hamachi the Psychotic Killer Released
I was able to reach a state with the game that I'm satisfied with much earlier than the planned release date, so here it is, after 8 years it's finally done. I hope whoever plays the game thoroughly enjoys it. I spent the entirety of February play testing/bug fixing and so I’m very confident it’ll be a seamless experience. However, if an unexpected problem occurs, I apologize! If you’d like to help me out, I have a pinned thread in the discussion area, where you can post crash errors/issues. Unless it's super specific, no need to explain how it happened, I can figure it out. But again, I’m confident the glue will hold. (hopefully). much love ♥︎Read full article on Community Announcements (gavinoriley)AnnouncementsOfficial
release date: march 20, 2026
the release date for the full game is march 20, 2026Read full article on Community Announcements (gavinoriley)
