One battlefield · Last capital standing
IRON CITADEL: FREE-FOR-ALL
- Choose two, three, or four bases. Solo mode fills every other base with independent AI commanders; Pass & Play gives every base to a person.
- Recruit within your army capacity, choose a strategy and target, then resolve a 22-second free-for-all battle.
- Capture the five field positions for income. Holding the central Citadel sends a small, weak militia detachment next round.
Victory: the last surviving capital wins. A capital is also required to complete research.
Research: every branch contains upgrades that can be researched forever. Repeatable income upgrades keep the same price.
Aircraft: aviation unlocks late. Fighters arrive from round 7, gunships from round 8, and bombers from round 10.
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