Explore a relatively small Imagined Order bunker, that now has only one resident, excluding you (and/or your party). Defend yourself from the horde, forming just outside the bunker door. Modify your rifle, or acquire a bigger firearm, you decide, and your choices matter. Complete side-quests, defeat mini-bosses, read flavor text, learn lore, summon a sentient 6ft banana with a ritual, you decide how you want to Survive.