You can actually just make a branching story for the target markets:

A brutal fascistic government is oppressing the common people. A rich and powerful inner member of the government knocks on the protagonist's door.

Male ending: He's here to audit you for corrupt reasons. You are likely to die soon, so you must take flight, and survive in the corrupt wasteland alone.

Female ending: He's hopelessly in love with you, as is the shirtless muscular rebel leader, but while you'll sleep with both of them, only one can be your true love!