Survive in the outskirts of pripyat for 72 hours and don't die from radiation, other players, the cryptids, or the deadly Russian army make a bio with but not limited to:

Name
Gender
Race
Accent
Origin
Back story
Weapon of choice
Sexuality (18+ only)
Stamina
Strength
Charisma
Endurance
Sneak
Each of these will affect how much you can carry, how well you can convince Russian death squads to not execute you, and how well you can fire you weapons and sneak