Without Flash support, browser-based gaming has all but been eliminated on Apple's iPad, though not entirely. Thanks to Sarien.net, iPad owners can relive (or discover for the first time) classic adventure games from Sierra, all playable on the iPad's Safari browser and all for free.
Here's what's available:
King's Quest 1-III
Leisure Suit Larry in the Land of the Lounge Lizards
Police Quest: In Pursuit of the Death Angel
Space Quest I-II
The Black Cauldron
The games have been slightly updated to take advantage of the touch interface, and there's even a unique multiplayer element. It's possible to bump into another player wandering the countryside in King's Quest, for example.
Some of the original games' creators have given their stamp of approval to Sarien.net, though Activision has yet to weigh in and probably won't be as thrilled. In other words, enjoy 'em while you can.