Monsters spawn outside your banner radius and walk toward your colonists. On a flat world, enemy pathing is completely predictable, allowing you to design perfect kill zones and maze traps.
Because the "Flat" setting flattens the geometry, the seed itself primarily influences the distribution of biomes, moisture levels, and the coordinates of specific resource nodes or regional borders. Here are thematic seed ideas to try out when generating your flat world: 1. The Endless Green Grid GRIDMASTER or 7777777 colony survival flat world seed
The Ultimate Colony Survival Flat World Seed Guide: How to Build Your Mega-Colony Monsters spawn outside your banner radius and walk
Divide your flat world into distinct chunks or sectors. A popular layout is the 50x50 block quadrant system: enemy pathing is completely predictable