Killzone 3 is a first-person shooter created by Guerrilla Games and published by Sony Computer Entertainment. The game continues the war between the ISA forces and the Helghast army, picking up right after the events of the second installment. Players step into the boots of Tomas "Sev" Sevchenko, a battle hardened soldier stranded behind enemy lines on the hostile planet Helghan. The story focuses on survival, brotherhood, and the brutal politics tearing the Helghast leadership apart. Guerrilla Games pushed the visual bar with detailed environments ranging from frozen wastelands to overgrown jungles and burning industrial cities. The shooting feels weighty and physical, with melee finishers that bring you face to face with enemies. Cover mechanics, iron sight aiming, and a heavy recoil model give every firefight a grounded military tone. The campaign mixes scripted set pieces with open combat zones, so players can flank Helghast squads or charge straight into their lines. The pacing keeps tension high from the opening retreat to the final orbital battle, making it a memorable chapter in the series.
Updated: Jun 22, 2026
Screenshots

1.4 GB · GameCube ROMs
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Specifications
| Platform | GameCube ROMs |
|---|---|
| Genre | Multiplayer |
| File Size | 1.4 GB |
| Developer | Guerrilla Games |
| Updated | Jun 22, 2026 |
Overview
Killzone 3 is a first-person shooter created by Guerrilla Games and published by Sony Computer Entertainment. The game continues the war between the ISA forces and the Helghast army, picking up right after the events of the second installment. Players step into the boots of Tomas "Sev" Sevchenko, a battle hardened soldier stranded behind enemy lines on the hostile planet Helghan. The story focuses on survival, brotherhood, and the brutal politics tearing the Helghast leadership apart. Guerrilla Games pushed the visual bar with detailed environments ranging from frozen wastelands to overgrown jungles and burning industrial cities. The shooting feels weighty and physical, with melee finishers that bring you face to face with enemies. Cover mechanics, iron sight aiming, and a heavy recoil model give every firefight a grounded military tone. The campaign mixes scripted set pieces with open combat zones, so players can flank Helghast squads or charge straight into their lines. The pacing keeps tension high from the opening retreat to the final orbital battle, making it a memorable chapter in the series.
The game offers a single player campaign that supports two player split screen co-op for the full story, a feature many shooters skipped at the time. Online multiplayer includes Guerrilla Warfare, Warzone, and Operations modes, with up to 24 players battling across maps designed for vehicles, jetpacks, and infantry combat. A class progression system rewards players with new weapons, abilities, and ribbons as they rank up, giving long term goals beyond simple kill counts. Weapons include the WASP rocket launcher, the StA52 assault rifle, and the brutal Helghast bolt gun, each with distinct recoil and feel. Players can also pilot mechs, jetpacks, and gun turrets across larger encounters. The variety of locations covers arctic glaciers, scrapyards, jungle ruins, and Helghast capital districts, giving each chapter a fresh look. Voice acting from Malcolm McDowell and Ray Winstone adds weight to the villain performances. The result is a polished, cinematic shooter that delivers strong action, tight controls, and one of the most atmospheric war stories on the platform.