The game takes place in the Seven Hours War aftermath. Fighting against blood shedding synths and frightening aliens, Adrian Shephard has to struggle his way with his fellow comrades from the Phoenix Command, with the main objective of stopping the construction of a Combine Citadel. In his journey he will find what has happened to the world, six months after the Seven Hour War.
The man who modeled this beast was DOG-GY, based on his own concepts. It went through various stages of texturing, based on suggestions from fans on ModDB, our forums and even other forums like Facepunch, until it finally got to the actual looks of it. The particles were done by Ghor, who also worked with Ferdam to get the collision models, attachments, the actual model working with the code and the enter/exit points right.
Finally, it was coded by Chris528 who based the gun on the original HL2 jeep code. It took us two months to brainstorm ideas, model the gun, get the model in-game, get the particles done, and actually test it until we thought it was perfect for the gameplay. You can see early tests he did of the Gauss-2 on his YouTube channel: Youtube.com
Songs (respectively) by Schmoe and Chaz.