There's already an AUR package:
$ yaourt cool-old-term
1 aur/cool-old-term-git c2fca95-1 (2)
A good looking terminal emulator which mimics the old cathode display.
Or can you recommend some "retro" fonts with unicode?
While I own, use and love Cathode, I'm glad to see this project. Cathode has several annoying bugs and only a few developers to work on them. It is poorly optimized and slays battery. With a community of developers I think this has potential to exceed Cathode, if it hasn't already.
For Linux, which Cathode does not support.