Begin with:

Character (Series of Origin)/Original (Race) Weapon 1 (Weapon description) Weapon 2 (Knife/Grenade/Throwing weapons) Location

You wake up to find everything in ruins, and you are alone. Every 1 day, you can choose an upgrade for your character. An elite boss will appear every 10 days. Your goal is to survive as long as possible, even after 10 days passed.