Unfortunately, the Steam Summer Sale hasn't started yet.
While we wait for Valve to deeply discount most titles through Flash Sales and Daily Deals, you can either visit the Green Man Gaming 666 Sale or enjoy a few free games on steam this weekend.
Available now until Sunday, July 7th, you will find the full – but temporary – downloads for Left 4 Dead 2 and Sonic & All-Stars Racing Transformed.
Fight the zombie horde in Left 4 Dead 2 with three of your friends or random people through multiple campaign levels. A recent update added Linux support and some fixes for the community made add-ons. If you desire something competitive you can also play Versus Mode where you can play as a team of zombies against a team of human players. You can purchase Left 4 Dead 2 for 75% off.
Race with your favorite Sonic characters in Sonic & All-Stars Racing Transformed. Each course with offer water, sky and ground racing as your vehicle transforms to fit the terrain. You can also purchase Sonic & All-Stars Racing Transformed for 75% off.
Both 75% Sales end Monday at 10am PST.