Original first person puzzle game “Portal” is free on Steam until the 20th September.
The promotion is running to help show that games such as Portal can be used within an education environment to teach science, physics and problem solving.
Valve have now seen an opportunity to use Portal to make all these mechanics/physics/problem solving ”cool and fun” and “gets us one step closer to our goal: engaged, thoughtful kids!”
The calm, bullet-free environment with humour and tricky puzzles made this one of the best games of 2007.
Portal is free on Steam until 20th September here.