The translation of the title (Prey (2017))

SkyraX
IMHO, the most likely would be translated as prey. In the sense that it is sentient prey for the hunter. And roots, most likely, should look from the original game 2006. In the case of this game, just use the purchased franchise, and some General motives.

IMHO, there is generally no transfer of meaning.

and I think victim

The Victim\Production

*victim*, but in the context of self-sacrifice;
according to the concept of both games the main character sacrifices himself for the salvation of mankind.

Spray