Last Fortress: Underground: How to Get 600 Troops per APC

To reach the maximum capacity of 600 soldiers per APC in Last Fortress: Underground, you must combine Command Center facility upgrades with targeted projects in your research laboratory. Increasing squad size directly raises your total deployment power, allowing your forces to endure tough player-versus-player combat, defeat high-level map targets, and take on world bosses without premature losses.

Level Up the Command Center

The Command Center serves as the foundational requirement for expanding APC squad size. Every upgrade level assigned to this facility raises the baseline cap for how many soldiers you can assign to your vehicles.

• Fund Building Upgrades First: Direct surplus food, stone, and iron into the Command Center whenever you satisfy its unlock prerequisites.
• Monitor Base Capacity: Check your APC interface after completing a level to view your new baseline squad cap.
• Avoid Progression Bottlenecks: Keep required prerequisite facilities upgraded continuously so building projects on the Command Center never stall.

Research Command Category Nodes

Building levels set your infrastructure floor, but reaching the 600-soldier limit requires targeted research laboratory investment. Navigate to the research menu and focus strictly on the Command category tree.

1. Open your laboratory and select the Command research branch.
2. Search for research nodes specifically designated as APC Troop Capacity.
3. Complete prerequisite tech upgrades to keep your research queue moving forward.
4. Upgrade your APC Troop Capacity projects sequentially to push squad numbers toward late-game thresholds.

If your troop count plateaus around 400 or 500 soldiers while your Command Center is high level, incomplete Command research nodes are the missing link.

Upgrade Prerequisites and APC Configurations

Not every APC in your fleet gains capacity at the same speed. Primary or advanced APC configurations receive capacity upgrades first, while auxiliary APC slots may lag behind until corresponding tech nodes unlock.

Gather resources through active harvesting, map events, and alliance activities to sustain both building construction times and research costs without exhausting your stockpiles.