How about making a MOD/DLC for Terra Invicta or maybe x-com that puts you in charge of a group of people who decide to fight corruption or put their fate in their own hands and build their organization, good or bad, heroes or villains.
Instead of aliens the enemy could be:
PMC's (private military contractors) with cyborgs or giant robots from the military corporations.
Crazed scientists who conduct experiences on people, making reptilian people or hulking abominations.
Supernatural forces, zombies, werewolves and fire demons.
...or all of the above
![Smile :)](./images/smilies/icon_e_smile.gif)
Also I hope it's closer to the original x-com then Enemy unknown.