Counter-Terrorists: Prevent Terrorists from bombing the nuclear payloads on two trains. Team members must defuse any bombs that threaten the payloads.
Other Notes: There are 2 payloads on the trains in the mission.
The original map featured plain textures derived from Half Life and the conflict was taking place in an industrial setting with a train station. Some of the sounds heard throughout the map were the engines of a plane, similar to cs_747.
The map was completely revamped from the textures to the environment of the area. Furthermore, the setting included a more lively atmosphere such as increased brightness and more sounds. Notably, the train cars have been improved for added realism and the back halls have been partially converted to a shower room and a lunch room. There are the sounds of hissing steam in the long hall, where there were boilers, and the plane sounds were replaced with that of train horns. Finally, the roof of Bombsite B has reduced in height, allowing players to counter snipers.
Valve made major improvements to de_train as the textures were changed once more. The nuclear payloads were replaced with radioactive barrels and the position of the bomb target in Bombsite B was moved out of the enclosed loading docks to the middle of the area. Furthermore, there are two roofs in that bombsite which allowed both teams to appoint a sniper for additional cover. Finally, the train cars no longer allowed players to move underneath them.
Main article: Train/Tips and tricks