Harvesting is an initial upgrade which allows woodcutters to produce/obtain herbs, a basic resource. To unlock it, 10 herbs are needed, which can be obtained by clicking the 'Cut Wood' button. Once unlocked, the upgrade takes place automatically.
| Upgrades | |
|---|---|
| Initial | Skinning • Harvesting • Prospecting • Masonry |
| Masonry | Domestication • Ploughshares • Irrigation – Construction • Granaries • Basic Weaponry • Basic Shields – Horseback Riding • The Wheel – Writing |
| Construction | Butchering • Gardening • Extraction – Architecture – Tenements • Palisade |
| Architecture | Flensing • Macerating – Crop Rotation • Selective Breeding • Fertilisers – Slums – Civil Service – Start Building Wonder |
| Writing | Administration • Code of Laws • Mathematics • Aesthetics |
| Civil Service | Feudalism • Guilds • Serfs • Nationalism |
| Trade | Trade • Currency • Commerce |