Efficiency Upgrades
Production Upgrades & Castle (Reg Hud)
- Total: 28g / acre (see note below)
- This includes all the production and housing upgrades along the way
- See list of production upgrades here Land Improvements
Mysterious Trader (Reg Hud)
- Total: 2g / acre (see note below)
- This is given in 1g/acre increments from the Trader. You can get this a maximum of two times.
NOTE: On the regular HUD you max out at 30g / acre between production upgrades, buying the castle, and getting upgrades from the trader.
The Book/The Key/The Abott (Fed Hud)
- Total: 2g / acre
- See here for more info Book, Key & Translation
Four Allies & Embassies (Fed Hud)
- Total: 1g / acre
- Once you've built 4 embassies, you get this bonus.
Fifth Ally & Embassy (Fed Hud)
- Total: 1g / acre
- Once you've built your 5th embassy, you get this bonus.
Jousts at Festival (Fed Hud)
- Total: 1g / acre
- Once you've won 10 jousts, you get this bonus.
Famine Research (Fed Hud)
- Total: 3g / acre
- Researching Famine 20 levels gives you 3g / acre.
Future / Missing
- Total: ?g / acre
- Copy / use this section to add more that have been left out.