Question 1

How do I play Metro Lines?

Accepted Answer

Drag from one station to another to draw a colored metro line. Trains automatically travel along lines, picking up and dropping off passengers whose shape matches the destination station. Connect lines so every shape has a destination. Don't let stations overcrowd!

Question 2

What happens when a station overcrowds?

Accepted Answer

When a station's passenger queue fills (6 waiting) and one more arrives, an overcrowd countdown starts. If the timer runs out, the game ends. Add more lines, trains, or carriages from weekly upgrades to keep things flowing.

Question 3

How do weekly upgrades work?

Accepted Answer

Every 30 seconds is one week. The game pauses and offers 2-4 upgrade cards: a new line, an extra train, a carriage (more capacity), or a bridge (cross rivers). Choose one to grow your network.

Question 4

How many levels are there?

Accepted Answer

22 hand-crafted scenario levels across five tiers (Tutorial, Easy, Medium, Hard, Expert) plus an endless procedural mode that unlocks after the tutorial.

Metro Lines — Free Online Subway Building Puzzle Game | GameZipper