Attila climate change
In the Grand Campaign the climate turns colder in 4 phases, on turns 19, 99, 149, 199. Each phase sets the world's fertility modifier lower: -1, -2, -3, -4.
Grand Campaign
| Phase | Starts on turn | Fertility modifier |
|---|---|---|
| Phase 1 | 19 | -1 |
| Phase 2 | 99 | -2 |
| Phase 3 | 149 | -3 |
| Phase 4 | 199 | -4 |
The Last Roman
| Phase | Starts on turn | Fertility modifier |
|---|---|---|
| Phase 1 | 23 | -8 |
| Phase 2 | 35 | -3 |
| Phase 3 | 59 | -1 |
| Phase 4 | 150 | 0 |
Fertility levels
The six levels the campaign map shows, lowest first, in the map's own colours.
- Infertile (0)
- Meagre (1)
- Poor (2)
- Average (3)
- Good (4)
- Rich (5)
From campaign_climate_change_phases (round_threshold, fertility_factor) and fertility_levels (Steam build 25370302). The modifier is the table's value for the phase. Buildings that add food and wealth per fertility level are on the buildings pages.