The undead never stop coming… but neither do you!
Mow down relentless hordes of zombies with wild weapons, devastating skills, and game breaking synergies in this fast-paced bullet heaven survival game crafted by a solo dev. Whether playing alone or teaming up in couch co-op, every run is chaotic, challenging, and full of surprises.
10 Survivors - 60 Skins
Choose from 10 unique heroes and collect over 60 skins to customize your survivor.
60+ Skills
Customize every run based on your game style, you can find anything you want! from critical chance builds, to lifesteal, summoning and more! Combine 28+ passive skills with powerful synergies to create game-breaking builds and unleash carnage your own way. Every run is different!
2 Players Couch Co-op Chaos
Double the firepower, double the mayhem! Team up in local couch co-op and fight side by side in the ultimate test of survival. Work together to create devastating builds, cover each other’s backs, and see if you can outlast the swarm!
5 Unique Scenarios
Five unique scenarios with their own mechanics, a gripping story on surviving the apocalypse.
30 Collectibles
Uncover 30 unique collectibles that reveal the events leading up to and during the apocalypse. Each one adds a piece to the puzzle of what really happened.
The Enemies
Face relentless hordes of Zs, but beware the Alpha Zs:
Sneaky – Silent but deadly.
Fatty – Slow, but explosive!
Fast – Quick and relentless.
Tanky – Tough and hard to take down.
Goliath – A force of nature that few can defeat.
This is just the beginning. As a passionate solo developer, I’m committed to delivering frequent updates with new heroes, weapons, skills, enemies, modes, and more, all based on your feedback! let's grow together!

macOS Warning: If you see a compatibility notice, the game still runs on macOS 10.15+ but is not notarized. You may need to allow the app manually in System Preferences → Security & Privacy.
ZK1L4 v2.2 is here: and its one of the biggest updates so far.
This update brings elite enemies, dynamic run modifiers, deeper combat, and major polish to both solo and couch co-op play.
[hr][/hr]New Elite: Golden Sir
A rare high-value zombie has entered the battlefield.
Golden Sir:
Drops large amounts of gold
[/*]Spawns with an escort of zombies
[/*]Switches between fleeing and attacking
[/*]Can suddenly burst into a high-speed sprint
[/*]
If you see him, hunt him. If you hear him, chase him.
[hr][/hr]Run Goals & Run Mutations
Every run is now more dynamic.
Youll encounter:
Run Goals that reward XP, healing, gold, or skill upgrades
[/*]Run Mutations that change how zombies behave (more enemies, faster hordes, glass-cannon waves, tanky mobs, and more)
[/*]
No two runs will feel the same.
[hr][/hr]Combat & Enemy Upgrades
Zombies now use proper collision bodies
[/*]Enemies feel more physical and aggressive
[/*]Improved pathing and stuck recovery
[/*]Elite enemies are more dramatic and threatening
[/*]Special zombies announce their arrival with on-screen messages
[/*]
The battlefield feels alive and dangerous.
[hr][/hr]Couch Co-op Improvements
Player 2 now receives full UI feedback
[/*]XP and gold scaling is balanced for co-op
[/*]Controller detection and UI switching improved
[/*]Vibration, messages, and pickups feel better for both players
[/*]
Visual & Audio Overhaul
Cleaner sprites and better readability
[/*]Improved contrast and clarity
[/*]New elite and loot visual effects
[/*]XP and SFX audio tuned to avoid noise spam
[/*]
Fixes & Stability
Fixed enemies spawning on top of each other
[/*]Fixed physics explosions and flying zombies
[/*]Improved performance and reliability
[/*]Multiple UI and controller fixes
[/*]
Minimum Setup
- OS: Linux distribution released after 2016
- Processor: Intel Core 2 Duo E8200. AMD Athlon XE BE-2300. Raspberry Pi 4Memory: 2 GB RAM
- Memory: 2 GB RAM
- Graphics: Intel HD Graphics 5500 (Broadwell). AMD Radeon R5 Graphics (Kaveri)
- Storage: 1 GB available space
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