Make sure to enable game instructor in options > multiplayer menu for important objective and key item text.
Claustrophobia (Once named "The Sewer") is a converted Half-Life 2 mod made by me.
This campaign features seven maps starting from a dank, dark sewer, leading all the way up to a Canyon, also features various puzzles and several optional paths to explore for supplies. Features a fairly difficult scavenge finale.
(Originally released in 2012 on GameMaps, and uploaded by a fan on Steam Workshop in 2019 in 3 seperate parts)
Special thanks to Bloue of GameMaps for helping me with NavMesh, some map edits, and other various things.
This campaign can also be found on GameMaps https://www.gamemaps.com/details/3987
Claustrophobia (HL2 Mod version) https://www.moddb.com/mods/hl2-claustrophobia