Ending today at 1 pm ET, Steam takes 50% to 75% off select Windows or Mac video game downloads as part of its Autumn Sale. With prices starting at $2.49, that puts a number of these titles at lowest-we-could-find prices. Notables:

• Demolition Inc. for Windows for $2.49
• Thief: Deadly Shadows for Windows (pictured) for $2.49
• Section 8: Prejudice for Windows for $3.24
• Europa Universalis III: Complete for Windows or Mac for $3.74
• Call of Duty: Modern Warfare 2 for Windows for $19.99
• browse the entire Steam Autumn Sale