Head to Outer Space in Steam Summer Sale Day 4

Steam Summer Sale day four has now begun with great savings on the hit downloadable title Kerbal Space Program. The indie title is now available for 40% off or $13.79 and tasks players with building their very own space program from the ground up including finding a crew, creating a space ship and piloting it to uncharted planets and moons.

The science fiction themes continue with big savings on other hit titles including the Portal series, Fallout: New Vegas, Sanctum 2 and Remember Me for up to 75% off. Other games available for sale today include Total War: Shogun for 75% off or $7.49, Hitman: Absolution for 75% off or $6.24 and The Sims 3 at half its normal price or $14.99.

Fans can also nab some new trading cards today and continue working towards the elusive Steam Summer Sale badge. Today features the Kerbal Space Program trading card sending you warm "Greetings from Sunny Space." Gamers can also continue voting for sales and unlocking new deals with the Steam Summer Sale flash sales featuring Ace Combat: Assault Horizon Enhanced Edition, NBA 2K13, Impire and Doom 3: BFG Edition with up to 75% savings.

For more information and a complete list of sales, check out the official Steam website.