Spacebuild3
From GMod Wiki
Spacebuild is a gamemode where you have to create ships to enter space and colonize other planets and fight other ships. These ships must be equipped with life support or you will suffocate in space. The primary model pack of this gamemode is called SBEP (Spacebuild Enhancement Pack) and is SVN format. (SVN:[1]) The Wikia for Spacebuild can be found here: [2]. Some of the community has lost interest due to the lack of new released material, however this may be revived with an upcoming Spacebuild 4, driven by user responses to Spacebuild 2 and 3.