Regions
The 15 campaign regions of IRON NEST, each with unique objectives, terrain, and targets. All names and achievement data sourced from Steam Community achievements.
The campaign is set in alternate-history Spain in the late 1920s, where the monarchy still holds power and a republican uprising is spreading across the country. You command a colossal dieselpunk turret under High Command's orders — but every chemical weapon decision is yours alone, and the press will report what you've done.
Source: Steam store page "Setting" section
Calibration Fire
Tutorial and calibration shooting. Learn the basic firing loop.
Fire and Light
Illumination and fire support. Introduces spotter triangulation.
Liberation
Enforce liberation. Adds underground cache and friendly protection.
Counter-Battery
Silence hostile artillery. Introduces the counter-battery timer.
Iron Road
Intercept the Iron Road. First moving target mission.
Siege of Cartagena
Break the siege. Chained installations and smoke-assisted breakout.
The Gorge
Survive the Gorge. Nest is damaged; manual observed-fire corrections.
Rock of Gibraltar
Strike the Rock. Locate without aerial recon; time-restricted firing.
Dead Reckoning
Trust dead reckoning. Hidden positions exposed with tear gas.
Fire on Call
Answer fire on call. Live support calls and danger-close shots.
High Tide
Turn the High Tide. Multiple landing-craft intercepts across both guns.
Blind Fire
Endure Blind Fire. Pure triangulation under pressure, no recon.
Phantom Battery
Hunt the Phantom Battery. Mobile battery after Emergency Move.
Final Harvest
Reap the Final Harvest. Moving train and static targets combined.
White Shells
The final mission. Four confirmed endings based on shell choice.
Achievement unlock rates from Steam Community (stats/2950790/achievements) as of August 2026. Rates decrease sharply after mid-campaign, reflecting the difficulty curve. Gold medal achievements for each mission have unlock rates below 1%.
Developer: Nick Nieuwoudt & Dominik Latos · All data sourced from official Steam channels.