The warrens of the Divide have taught you to keep your head down. Your movement speed is greatly increased while sneaking in light armor, or when wearing no armor at all.”— In-game description
- This perk does work with Implant M-5, for a net decrease of only 14.5% movement speed when sneaking.
- The Travel Light and Light Touch perks work very well with Tunnel Runner.
- With Silent Running and Tunnel Runner, you can sneak up to someone very quickly and quietly.