Stoplights

Stoplights is a management and planning game about building cities near resources, linking them by rail and directing automatic train traffic with signals. You must keep each city supplied as its needs grow and the network becomes more complex.

Build and manage the network

Build cities, rails and signals. Signals divide long stretches of rail into shorter segments, while trains choose automatic routes to the nearest viable, unobstructed resources in connected cities. Your control over their routes is indirect, and trains can collide.

You win by reaching the last day without any city running out of the resources it demands. Inefficient routes, poorly placed signals and long waits at junctions can lead to failure. You can pause or fast-forward the simulation and play at your own pace.

Maps and difficulty

The game includes hand-crafted maps with semi-random resource placements. Its hand-crafted map scenarios use pseudo-random outcomes designed to balance fairness and repeatability. There are 12 difficulty settings, which affect the score multiplier, as well as difficulty-based leaderboards.

Tutorial videos explain the mechanics. Gameplay uses virtually no text apart from a few settings.