The Half-Life 2 Collection and EVE Online: Tyrannis represent this week's latest additions to the Steam for Mac digital distribution platform, operator Valve has announced.

The Mac editions of Valve's celebrated shooters Half-Life 2, Half-Life 2: Episode One and Half-Life 2: Episode Two are now available through the digital distribution platform, while Tyrannis--the lastest update to CCP's space-faring MMO EVE Online--will hit "later today" and marks "Steam's first day-and-date release for the Mac and PC."

To commemorate the occasion, Steam has discounted all three Half-Life 2 titles by 30%, making Half-Life 2 $6.99, Episode One $5.59 and Episode Two $5.59.

Those that already own any of the Half-Life 2 titles via Steam

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