Calibration Fire
M1The core firing loop: read the order, measure, calculate, load, aim, fire — without time pressure.
IRON NEST Demo Guide
The IRON NEST demo is a compact way to learn the game's central skill: turning orders and battlefield information into accurate artillery fire. It introduces the map table, Spotter reports, shell selection, the Ballistic Calculator, manual loading, turret rotation, and elevation.
- Status
- Official demo listed separately on Steam, marked Single-player / Game demo.
- Content Volume
- The developer describes roughly 3.5–4 hours of non-repeating play, with replayable missions.
- Source
- Steam demo page and developer discussion replies. Last verified 2026-08-14.
Training Objectives
What the Demo Teaches
Treat the demo as a gunnery school, not a teaser. Each mission adds one more link to the same chain.
- 01
Read High Command and field reports before touching the loader.
- 02
Plot coordinates and Spotter positions on the tactical map.
- 03
Use bearing lines and distance arcs to locate uncertain targets.
- 04
Choose a shell and powder charge that match the mission.
- 05
Generate a firing solution, then operate the gun by hand.
- 06
Review the result and treat follow-up information as a new problem.
Mission Roster
Demo Missions & What Each One Teaches
Fire and Light
M2Spotter information, bearing and distance clues, and correction-oriented use of illumination.
Liberation
M3Repositioning, requisition, target selection around friendly units, and repeated firing solutions.
Counter-Battery
M4Preparation under pressure: reconnaissance first, pre-planned solutions, then fast execution.
Version note — this roster comes from current research records (including community and speedrun listings). Mission counts and mode labels can vary by version, and whether replayable challenge modes are counted. Check the current in-game menu before treating this list as a permanent fact. To be verified in the current build.
Gunnery Doctrine
How to Approach Each Mission
Solve the map before touching the gun. Read High Command and field reports first. Mark what you know, draw what you can infer, and only then walk to the loader.
Measure from the right origin. Spotter bearings are drawn from the Spotter, not from the Iron Nest. The final firing bearing and range are always re-measured from the current Iron Nest position.
Recalculate when anything changes. New report, new shell, new charge, new position — each one means a new firing problem, not an adjustment of the old one.
Procedure details above summarize community-tested practice from Steam player guides and third-party walkthroughs; treat them as field experience, not official rules.