One Man (Cancelled Half-Life Expansion)

One Man is a cancelled single player Half-Life expansion pack that was developed by Barking Dog Studios's popdog team.

Overview

One Man was simply described as "Die hard in space". It didn't develop further then the concept; however a playable build was apparently made, however incredibly rough.

References

https://www.valvetime.net/threads/barking-dog-studios-work-for-valve.257918/