So I was browsing the Steam Workshop for Garry's Mod and I stumbled upon a new map for Trouble In Terrorist Town called 'ttt_eclipse' by ^3Options and out of curiosity I subscribed to it on the workshop and I decided to explore it in singleplayer sandbox mode. Needless to say its a decently-sized sci-fi-themed map with custom textures and models ripped from Black Mesa and Portal. According to the author it has: 1 Detective room 3 Traitor traps 2 Weapon rooms 64 spawns AI Nodes (Not really necessary for TTT but whatever!) Sandbox Compatability (Once again, not necessary for TTT but still a nice feature!) Here a screenshots the author posted up: The map can be found here on the workshop.
I apologize for necrobumping but this map has had several updates since the thread was started including a number of additions to the map's actual layout and some fixes for bugs/glitches.