Steam game

Gun Up

Kill the undead, get new weapons, combine weapons, kill even more undead! Over 20 weapons, INFINITE combinations. Featuring different locations to play and survive. How long can you survive?

$3.99 January 9, 2026

By Horsepower Interactive

Windows
View on Steam
Gun Up - Horsepower Interactive. Popular. Released January 9, 2026
Screenshot of Gun Up gameplay showing in-action mechanics Screenshot 2 of Gun Up - additional gameplay view Screenshot 3 of Gun Up - more gameplay footage Screenshot 4 of Gun Up - final gameplay screenshot

Overview

About this game

A zombie outbreak has overrun the city of New Horseon. With access to improvised and experimental weaponry, your only goal is simple: survive for as long as you can.

Wave-Based Survival
Fight off increasingly difficult waves of enemies and see how long you can survive.

20+ Unique Weapons
Including melee weapons, rifles, grenades, and special weapons — each with distinct behavior.

INFINITE Weapon Mixing System
Combine two weapons for a chance to create powerful (or unpredictable) new guns.

Varied Maps

Switch between multiple maps (More on the way)

Varied Enemies
Face different enemy types that demand changing tactics.

Hidden Easter Eggs
Secrets are scattered throughout the map for curious players to uncover.

Customizable Playstyle
Pick your loadout and adapt your approach through weapon combinations.

Dynamic Environment
Directional light and environmental conditions affect the atmosphere and feel of each match.

CO-OP
Now you are able to play with your friends up to 8 player in single lobby!

Ongoing Content Updates
There are +3 more planned maps coming soon,  more enemy variations, boss enemies, and more easter eggs

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