Pangea Software has announced that they have made their games for iOS free, for Monday only. The company is marking its third anniversary on the App Store by making their entire catalog of iOS games free. The sale lasts from 8 AM to 8 PM Central time on July 11.

[ad#Google Adsense 300×250 in story]Pangea’s game library includes Enigmo, Engimo 2, Enigmo Deluxe – best-selling physics-based puzzle games. Bill Frontier, Bugdom 2, Cro-Mag Rally, Antimatter, Warheads, Nanosaur 2, Otto Matic and Quarters.

Pangea Software president Brian Greenstone said he’s doing this as a “thank you” to Pangea’s customers. Since 2008 the company has seen over $7 million in sales. “iOS and the App Store are the most important things to come along in the video game industry in a generation,” said Greenstone.

In related news, Pangea plans to release updates to many of their games for iOS 5, which is due this fall. Pangea noted that the updates will be significant, especially for Nanosaur 2 and Cro-Mag Rally, both of which feature multiplayer support.