As with much of Combine technology, the Razor Train is large, mostly featureless, and imposing. Custom-built to work on the existing human rail networks, it transports cargo, human prisoners, mainly to to Nova Prospekt, as well as Overwatch Soldiers and Stalkers, to the Citadel. Their ram-like, razor-thin appearance and all-black finish add to the threatening look of the fast moving vehicle. Razor Train locomotives also bear red markings on its left side. While Razor Trains are very fast and completely unyielding to any objects that may be on the tracks, from other vehicles to people to even friendly Combine units, all locomotives have what appear to be a driver's cab, though no crew can be spotted. As seen in the Combine Depot and in Route Kanal, the trains seem to carry short loads in rapid succession at high speed as opposed to fewer but more heavily loaded trains. Razor Trains accompany human trains on the same railways.
Perhaps the most disconcerting aspect of the Razor Train is its horn: a distinctive, discordant bellow that announces the train's arrival. This is by no means always the case, though, as several times during Half-Life 2 and its episodes, they emit low air horn bellows instead. In addition, both of these sound effects are occasionally higher than normal, as exhibited in Route Kanal and Highway 17 chapters of Half-Life 2.
 Behind the scenes
Concept art of a Razor Train traveling through the Wasteland, based on the map "
A Razor Train about to ram the player at Bridge Point.
A Stalker car.
Dead Zombines in a Razor Train.
 List of appearances
- Half-Life 2 at E3 2004: Train Station (First appearance) (Non-canonical appearance)
- Half-Life 2
- Half-Life 2: Raising the Bar (Non-canonical appearance)
- Half-Life 2: Deathmatch (Non-canonical appearance)
- Half-Life 2: Episode One
|Vehicles, vessels and transportation|
|Aperture Science transportation||Borealis · Teleportation|
|Black Mesa transportation||Black Mesa SUV · Black Mesa Transit System · Black Mesa truck · Rail cart · Teleportation|
|Black Ops transportation||AH-64 Apache · M44 cargo truck|
|HECU transportation||AH-64 Apache · Jet · M1A1 Abrams · M2A3 Bradley · M44 cargo truck · Osprey Heliplane|
|Combine transportations||Advisor Platform · Armored Personnel Carrier · Hunter-Chopper · Razor Train · Teleportation|
|Resistance transportation||Airboat · Mil Mi-8 · Muscle Car · Scout Car · Teleportation|
|Xen transportation||Alien Craft · Teleportation|
|Trainstations||City 17 Trainstation · Depot · Technical Trainstation|
|Other||Rail transport · Road transport|
|Black Ops (cut)||Osprey Heliplane|
|Combine (cut)||AirEx Truck · C-130 · Combine SWAT Truck · M2A3 Bradley · Merkava · Osprey Heliplane · School Bus|
|Resistance (cut)||Borealis · C-130 · Jalopy · Jet Ski · Osprey Heliplane · Submarine|
|Other (cut)||Digger · Stealth|