Representing Steam's first day-and-date release for the Mac and PC, EVE Online: Tyrannis will be available to gamers later today,
The Half-Life 2 titles available now feature cross-platform support for Steam Cloud, allowing players to save their game progress on one computer, then seamlessly resume from that save point on another computer (Mac or PC).
In addition, HL2 and Episode One have been updated to include over 40 new Steam Achievements, which are available to all owners of these titles. The HL2 games also support Steam Play, enabling customers to purchase a game once and play it on all Steam supported platforms.
To celebrate the launch of the Half-Life 2 games, the titles are available for 30% off their regular price (for a limited time).