The Rail Spikes are a cosmetic item for the Pyro. It adds paintable gold bands covered with steel spikes to the Pyro's neck, gloves and oxygen tank, as well as making the Pyro's default boots slightly larger. These spikes are similar to the ones that Dr. Rockso wears on the television series Metalocalypse.
- The Rail Spikes were added to the game.
- In DirectX 8, the spike textures are replaced with fire textures.
- The item's description is a reference to a line spoken by Wheatley in Portal 2: "Had a bit of a brain wave. There I was, smashing some steel plates together, and I thought, 'yes, it's deadly. But what's missing? What's missing?' And I thought lots of sharp bits welded onto the flat bits."