This President’s Day Weekend edition of our Apps Gone Free roundup coincides with the third anniversary of the Sentinel: Mars Defense release, a popular tower defense game from the folks at Origin8. Together with Sentinel 2: Earth Defense (TMA Review) and Sentinel 3: Homeworld (TMA Review), the series has managed to rack up more than 3 million downloads on the App Store. To celebrate, the TD triology is now a free download for the entire weekend. Another noteworthy app that’s gone from paid–>free is G5 Entertainment’s Treasure Seekers: Visions of Gold for both the iPhone and iPad, a solid puzzle-oriented title with mini-games and hidden object gameplay mixed in. Check out the entire list of freebies after the break.
Note: If you missed our previous Apps Gone Free post, a good number from that roundup are currently still free on the App Store.