Originally, the rail track at the end of the map c2a2f wasn't destroyed. Half-Life: Source contains a couple of test maps that include portions of the chapter. The level code for the chapter is 'Trains and Rockets' in the Dreamcast version. The player can't go back to the map c2a2f, because the ladder gets damaged when the player is climbing down. The player has to leave the rail cart behind, and go through an air duct in a nearby storage room to reach the next level. There is a door that can not be opened at the end of the map c2a2c.

The console ports features some minor changes. They can be seen in ' train.mpg', a trailer for the game. Stukabats were to appear near the sparking electrical wires in the map c2a2f. The area where the Sergeant is seen is called HWG in the source file of the map, which may stand for 'Heavy Weapons Guy'. At least one Human Sergeant was to appear in the map c2a2e, in the area with the Vortigaunts. Not much known about the early versions of the chapter. The path to the rocket is marked by numerous military outposts, fortifications, gun emplacements waiting in ambush.ĭevelopment Pre-release Along the rails are a number of side areas that the player can stop his cart at and explore, sometimes a necessity in order to reach track controls that remove barriers. The tunnels themselves are laid out with several dead ends and looping tracks. The path of the rail carts can be switched at certain junctions, offering a somewhat non-linear gameplay experience. Instead, travel is primarily accomplished with rail carts set on different tracks.

Trekking through the underground system of tunnels on foot is typically undesirable as the electrified rail is often the only means of transport over environmental obstacles such as flooded canals. The purpose of the rocket was later elaborated upon in the expansion, Decay. The science team needs this satellite in orbit to stop the alien invasion, but as the military has aborted the launch, the player must find the High Altitude Launch Center and launch it from the from the control room himself. The player is informed that he needs to travel through the rail system to reach a satellite delivery rocket. At the beginning of the chapter, a waiting security guard delivers a message to the player from the science team at the Lambda Complex. The chapter takes place in a large underground transit system in Sector E. For the the game's full story, see the Half-Life storyline article.

Half life on a rail