Thursday, 21 August 2014 21:25
Nvidia brings new visual effects to mobile Half-Life 2 and Portal
Exclusive to Tegra K1 SoC
Wednesday, 14 May 2014 09:16
Nvidia Shield gets Half Life 2
Portal as well, $9.99 each
Friday, 09 May 2014 15:09
Valve's Portal coming to Shield on May 12th
Half Life 2 teased as well
Monday, 27 June 2011 12:56
Vatican gets online portal

Top of the Popes
Wednesday, 19 January 2011 09:35
PS3 Portal 2 has cross platform play

Steam functionality is the key reason