Hi,
just thought I’d share this link about the unreal engine:
http://www.mynewsdesk.com/us/tobii_technology/pressreleases/tobii-releases-eyex-plug-in-for-unreal-engine-4-1093860
Here as well a video tutorial about it: https://www.youtube.com/watch?v=0ISrY1aMSLs
More info on how to get it: http://developer.tobii.com/introducing-tobii-eyex-plugin-unreal-engine-4/
Cheers,
Konstantin