The Steam Summer Sale continues, with new discounts on games for Windows and Mac. Many are at the lowest price we've seen, most by significant margins. Some of the deals, which end July 20 at 1 am ET:

• Plants vs. Zombies GOTY Edition for Windows or Mac for $2.49
• Amnesia: The Dark Descent for Windows or Mac for $4.99
• Fallout: New Vegas for Windows (pictured) for $4.99
• Alan Wake for Windows for $7.49
• browse the entire Steam Summer Sale