'm looking for a non-canon X-COM game. I would prefer it if you have played the new game.
The plot revolves around a pretty scionic sniper and a large, ruthless humanoid. The humanoid comes from a distant warrior planet and was captured by the Ethereals to serve as a body guard. They control him and his psychic powers via dampening sensor/metals in his armor.
Once the Ethereals are destroyed, their control is lost and the alien is free to assert his own will. The first thing he does is kidnap the wounded sniper and return to his own planet.
The aliens of that planet live an odd life. On one hand, they have machines that can-over the course of a few hours-heal wounds that should take months! On the other, they live in huts and with small semi-nomadic tribes.
Sex and violence are mixed on this planet. When the alien enters a battle lust, he admits a strong aphrodisiac pheromone which is nearly impossible to resist. The female will respond by becoming aggressive until the male is able to restrain and penetrate her.
There is a lack of females in this society as most babies born are male and females are prized. A male lucky enough to claim and impregnate a female keeps her until his death. It is very rare for him to be killed solely for access to the female.
I will be playing the sniper, who's kept half as a claimed and impregnated mate and half of a war trophy.