A total of 45 Gunchests were produced, but only one remains.
Check out this twisted and humorous series!
Hilarious antics in space!
When you beat Portal you're treated to this song. It's called "Still Alive" by Jonathan Coulton (http://www.jonathancoult on.com/). Loved it so much I made it into a video. Enjoy!
Edit: Added in music credits. Thanks!