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Rock 24

Escape the prison that is Rock 24, now in Gmod!
This is fully functional (even the npc textures); I played through this entire addon, without having to cheat once.

Rock 24 takes place on an abandoned Cliffside prison. The prison is situated on the side of a sheer cliff face meaning the only real way in and out is by air. The combine have moved in to the facility and are re-using it as a place to hold rebel leaders and other important Rebels. Gordon is required to infiltrate, free the Rebel leader and hopefully escape from the facility alive. Unfortunately the prison is rapidly deteriorating around him and there isn't much time. (ModDB description)

My most bug-free addon yet! (Except for maybe the Cratastrophy)

If you feel like supporting me and my projects, feel free to donate Steam or Team Fortress 2 items here: https://steamhost.cn/steamcommunity_com/tradeoffer/new/?partner=124209973&token=eMuak0BW

Was neither designed or made by me. Not tested for multiplayer either, but go ahead and try! (Don't forget to give me a heads up on how it works out). ModDB page:
http://www.moddb.com/mods/rock-24

Remember: the maps have their own map category (named Rock 24), and they all have map icons!

Most bug-free doesn't mean completely bug-free:
1, the transition between the first and the second map doesn't work automatically, you'll need to manually load the next map.
2, the second map has some flickering props, but only in the first room.
3, the credits don't work, like with any map in gmod.

I couldn't find any copyright or trademark notices on the ModDB page, so I assumed it was O.K. to upload. Nonetheless, if VALVe or any other authority wants this taken down, I will.