This prefab contains everything you need to create your own Glass Attack map for Team Fortress 2.
Glass Attack is an death-match arena-styled game mode. The goal is to defeat everyone on the opposite team by either killing them through damage dealt with weapons, or by causing them to fall to their death by manipulating the glass architecture of the maps. You can see examples of completed maps by viewing all the ones on GameBanana here. If you are interested in learning how to run a server to play Glass Attack on, you can visit the AlliedModders thread here and grab the plugin.
Extract the zip to \sourcesdk_content\tf\mapsrc, and open the .vmf in HAMMER. Then all you have to do is copy and paste everything into your map, ungroup and manipulate it however you'd like.