"With this DLC, you'll unlock the Green Metro Line.

Green Line DLC features:
- 5 new stations with their own side story
- New drone: Vetter
- New sword: Stun Baton
- Unique enemies and boss
- Difficulty: Easy

The Green line is available after completing [Station 4]"

More details on the official game page of CybeRage: Green Line DLC ...