Castes are specialised kinds of ant the colony evolves with Evolution points from flights and unions. Each caste changes how the colony works and appears walking the map.
| Caste | Cost | Needs | From | Effect |
|---|---|---|---|---|
| Harvesters | 1 | — | Stone Age | +15% Food |
| Leafcutters | 1 | — | Bronze Age | +15% Materials |
| Scouts | 1 | — | Iron Age | +15% Population growth |
| Honeypots | 2 | Harvesters | Steam Age | +40% Storage, +10% Food |
| Weavers | 2 | Leafcutters | Industrial Age | +15% Population cap |
| Raiders | 2 | Scouts | Atomic Age | +30% Combat damage, +10% Army size |