Exclusively for Prime members, Amazon takes 20% off pre-orders of physical video games. (Downloads are excluded. This discount applies at checkout.) Even better, this offer extends through two weeks after the game is released, and will be extended to pre-existing Prime member pre-orders. Plus, Amazon Prime members bag free shipping. A couple of best bets:

• Gravity Rush Remastered for PS4 for $23.99 (low by $6)
• Far Cry Primal for PS4, Xbox One, or PC for $47.99 (pictured, low by $12)