From Wikipedia:
So really like...nothing of value. I'm guessing they were cheap.
To add from Hero of Legend's thread
http://www.neogaf.com/forum/showthread.php?t=1139438
Most recently Tantalus, with their alternate brand name Straight Right did the ports of:
Mass Effect 3 (PS360 to Wii U)
Deus Ex: Human Revolution Director's Cut (PS360 to Wii U, the DC release was initially exclusive but was also enhanced for PS360 by Snowed In Studios, Tantalus still exclusively did the Wii U version)
Zombi (Zombi U Wii U to PS4 and XBO)