Play begins in media-res — a first mission gone wrong, a trial by fire.
PCs begin in a high tech laboratory hidden inside an abandoned looking pre-Cataclysm factory on a routine exploratory mission
PCs notice both a Coalition special ops unit and a troop of Federation of Magic mages coming in their direction as they scramble to deal with the situation and get out safely
We’ve got one living but quickly dying doppleganger of a PC (the result of a dangerous cloning technology that the PCs found on a routine exploratory mission they were sent on) of the PCs with the rest dead. We’ve got killer robots going on a rampage. We’ve got demons chasing after non-demons (telepathic? they can express their non-evil-ness). All sides are fighting all other sides and the PCs are stuck in the middle of it all.
The PCs are hunkered down in a bunker of some kind fending off attackers on all sides. Objective: Survive / Escape