plastk:net - Quake 3
That looks like it’d be a lot of fun. Reminds me of running doom back in the day with 3 computers and 3 monitors.
Our lab also has a 24 monitor display wall, and as you can see from the pictures below, I got Quake 3 running on it. The system is driven by 12 linux servers (2 monitors per server) using Distributed Multihead X (DMX) and Chromium.