Colonization still carries a forgotten developer menu. In the DOS version hold Alt and type W, I, N — a new Cheat item appears in the top bar and the Shift combinations start working. Alt + W switches it off again. On a French AZERTY keyboard press Z instead of W; in the Windows release you hold Ctrl instead of Alt.
CodeEffect
Alt + W, I, NEnables cheat mode (adds the Cheat menu)
Alt + WDisables cheat mode
Shift + 1In a colony: completes every building
Shift + 2In a colony: removes the town hall
Shift + 4In a colony: adds 1,000 gold
Shift + 5In a colony: adds 100 of the selected cargo
Shift + 6In a colony: adds 100 of the current selection
Shift + SIn a colony: promotes the selected colonist
Shift + TIn a colony: adds colonists (up to 31)
Shift + SpacePlays out the entire turn instantly
Shift + F1On the map: creates a colonist of any type
Shift + F2On the map: shows debug information
Shift + F4On the map: reveals the whole map
Shift + F5On the map: switches which nation you play
Shift + F6On the map: wipes out all natives
Shift + F7On the map: advances the revolution status
Shift + F8On the map: shows the AI’s strategy
Shift + F9On the map: shows the colony-site ranking
Shift + F10On the map: runs an internal test routine
You can tell this is a testing leftover by how long the list is and how little it pretends to be part of the game — Shift + F8 literally prints out what the computer is thinking. In some builds cheat mode disables the high-score table, so you cannot spoil a record run with it. The most useful pair for ordinary play is Shift + F4 (you see the whole continent) and Shift + Space, which cuts through the long waits for the AI turns.