Who is the payer name on the 1099? What is the reason for the payout? Example:
Prize from the Automobile factory or some honest competition? Box 3 is fine, and that is Other Income.
Or, Bonus from the employer? Box 3 is an error; it should be on the W2 and should have been run through as payroll.
"Level Up" is a gaming function, not a real life function.