OpenTTD

Build rail, road, sea and air networks in this open take on Transport Tycoon Deluxe. Multiplayer included.

Why it matters

A playful lesson in logistics, supply chains and long-term planning.

Pro tips

1. Open with a coal line from mine to power station: heavy cargo, steady profit, easy to learn.
2. Choose medium distances. Too short earns little; too long with slow vehicles lets cargo lose value.
3. Prefer one-way or double track and signal it properly to avoid jams.
4. Watch profit per vehicle, sell the losers and replace old, breakdown-prone ones.
5. Take an early loan to expand quickly, then repay it once cash flow is stable.

Image from the project's own page, README or Wikimedia Commons, owned by its creators. Source