Just in case you missed the isometric adventure game Lara Croft an the Guardian of Light in 2010, you can now play the game for absolutely free. Square Enix has added the title to its "Core Online" platform, the ad-supported, browser-based game service it launched it August.

The game is supported on Chrome, Firefox, and IE browsers, and Mac users can play it using Chrome's Native Client. The game received positive reception from critics, despite being a fairly radical departure from the standard Tomb Raider series. It's a co-op adventure in which Lara teams up with a 2,000 year old Mayan warrior named Totec to recover the Mirror of Smoke.

Core Online currently hosts Hitman: Blood Money and Mini Ninjas, and still plans to release Tomb Raider Underworld and Gyromancer as promised in the initial announcement. As previously reported, the Core Online business model lets you choose between watching intermittent ads, or paying a fee to bypass them altogether.