[X]Search for Tilly: Find your old commander. Surely someone so important while alive must be important while dead?
You ask around, but there seems to be no word of Tilly. You find a few people who died during the war, but it seems most are civilians, still leery of you for your deeds. While wandering the camp one day, you end up hearing a rumor. It seems someone is recruiting for a mercenary band, designed to fight in the various wars in Hell and also hire themselves to the living as protection. Now, you did horrible things while a mercenary, but it's also something you have experience with. You were an arquebusier, skilled in standing your ground and bleeding while firing away. There are likely few guns in Hell yet, but you are also good with a blade. Perhaps you can fall back on your old experience, just … not do bad things to civilians? On the other hand, you could always just…go. There's nothing holding you here, really. You don't really need food or water to survive, though you'll still feel hunger and thirst.
[]Join the mercenaries: Maybe things will be different now?
[]Just leave the camp and wander: Random encounters ahoy!