Tobii is compatible with other games like DayZ, but it says this is the first time it has included the ability to mark enemies for your allies. Besides the Enemy Tagging feature, its devices will also give you a way to move between covers, aim your weapons and even select locations on the map by moving your eyes towards the target. Your game will hide UI elements like health and ammunition from the screen, as well, until you look at the areas where they're supposed to be.

The video below shows the new features Tobii's eye trackers can add to your game, in case you're of two minds about getting one: