The desert area with the tank is named 'comm start' in the source file of c3a1a. It is possible that the player was to unlock the door and enter the complex from here.

In addition to this, the brush work matches the room with the large lift from the beginning of the chapter Lambda Core. The early texture for the door had ' USNRC' written on it. The inaccessible Lambda Complex door before the canals is named c3a2_ncrdoor1, a leftover from the Communications Center era of the chapter. The area is referred to as Central Command and Communications in the text strings. Unused Black Mesa Announcement System lines for the chapter can be found in the sentences file used for the speech system. The multiplayer map, Lambda Bunker, is based on the first two maps of the chapter. The title 'On Your Own' can be also found in the maps. The original chapter title was 'You're On Your Own'. The Source version contains a couple of test maps that include portions of the chapter. The level code for the chapter is Soldiers Eat Tacos in the Dreamcast version. The Energy Cannon is not present in the console ports of the game.

The loading bay survived into the final game while its general premise, including unused dialogue clips, were recycled for Uplink. Originally beginning in the loading bay, the player was to enter the Communications Center to unlock the door to the Reactor Labs at the beginning of the chapter. Communications Center is the predecessor of 'Forget About Freeman!', and is the fifth chapter in the Alpha version of the game.

Half life surface tension