Katana Zero is a hard game about a man who can see the future and still cannot outrun his past. Askiisoft’s 2019 neo-noir action platformer puts you behind the katana of Subject Zero, an amnesiac assassin who slows time, glimpses what comes next, and dies in a single hit. It is punishing, precise, and one of the better indie games of its year.
Trailer, via DevolverDigital.
Subject Zero and the Psychiatrist
Zero works assassination contracts for his psychiatrist, who doubles as his handler and supplies the drug that fuels his precognition. Targets include drug dealers and a political prisoner. The news media blames the killings on a serial killer called the Dragon. Zero has nightmares of a child in a hut, a scientist who warns the child to hide and is shot moments later, and a past he cannot hold onto.
The game never lets him rest in that confusion. It uses it.
Eleven Levels, One Hit, No Mercy
Katana Zero is a 2D side-scrolling hack-and-slash spread across eleven levels. Zero runs, jumps, wall kicks, throws lamps and pots, and cuts. Any damage kills him instantly, sending him back to the last checkpoint. Levels break into rooms, and every enemy in a room must die before you move on. The precognition framing device is smart: each attempt is a scenario Zero has already foreseen, so dying reads as part of the fiction rather than a failure screen.
The comparisons to Hotline Miami are fair. Both fill rooms with enemies, kill in one hit, and ask you to plan a route before you move. Katana Zero’s time-slow meter, which refills gradually, gives it its own rhythm.
| Feature | Katana Zero | Hotline Miami |
|---|---|---|
| Perspective | Side-scrolling, 2D | Top-down |
| Player death | One hit, instant | One hit, instant |
| Core tool | Katana, time-slow meter | Melee and firearms |
| Structure | Eleven levels, precognition framing | Levels of enemies to clear |
Dialogue Trees That Change Zero
Between levels, you talk. The psychiatrist, the girl next door, and a Russian antagonist named V all speak through a real-time dialogue tree. You can interrupt anyone mid-sentence. That choice shapes how much exposition you get and who Zero is — interrupt constantly and he reads as rude. The choices do not rewrite the plot, but they alter events, and one boss fight only opens if you pick the right responses.
It is a rare system that makes rudeness a mechanic instead of a cutscene.
Hard Mode, Speedrun Mode, and the Soundtrack
Two modes sit outside the campaign. Hard mode adds tougher levels, new enemy types, reworked bosses, and extra challenges. Speedrun mode times every level and lets you tweak enemy behavior and skip cutscenes.
The synthwave score comes from Bill Kiley and Thijs “LudoWic” Lodewijk. Justin Stander, who started the project in 2013 and built it largely alone in GameMaker Studio 2, drew story inspiration from Sin City and John Wick. The neon aesthetic earns that lineage.
Katana Zero is available on Android, PC, iOS, Mac, Xbox One, and Nintendo Switch. It was published by Devolver Digital and Netflix.
The instant-death design is the whole argument. It forces you to learn a room instead of absorbing hits, and the time-slow meter keeps that learning from becoming pure memorization. The dialogue tree is the more surprising achievement — most action games treat conversation as a pause, and this one makes it part of Zero’s character. The story’s amnesia-and-conspiracy spine is familiar, and the game leans on it hard, but the combat and the writing carry the weight.
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