(b) They demonstrated the Pi running Quake 3 at a reasonable frame rate in 2011. There's a picture of it in the blog post.
(c) The competition rules say "To submit an Entry, and Entrant shall email a link to a public GitHub repository containing the full source code for the Entry..." so just showing the result wouldn't be eligible to win. That and they already know what it looks like, because of (b).
(b) They demonstrated the Pi running Quake 3 at a reasonable frame rate in 2011. There's a picture of it in the blog post.
(c) The competition rules say "To submit an Entry, and Entrant shall email a link to a public GitHub repository containing the full source code for the Entry..." so just showing the result wouldn't be eligible to win. That and they already know what it looks like, because of (b).