Started back in the summer of 2010, the Time Geeks series has been an apparent overall success with games featuring retro graphics, pick up and play simplicity, and plenty of content. For the first three releases, Cory Games took a puzzle-style gameplay approach to expressing the adventures. However, today’s launch of the fourth installment, Jump to Medieval, moves the franchise into a new gaming genre.

At the forefront, Time Geeks: Find All introduces players to the evil Zoorg creatures in a challenging hidden objects game. The goal is to help the Time Geeks find every last person, animal, and object that was displaced by the Zoorgs to avoid the destruction of the space-time continuum.

Next up was the cloning fiasco of Time Geeks: Cloneggs. After cracking the eggs, match the cloned beings to remove them. It may seem overly basic, but things will get frantic soon enough.

In the third installment, Time Geeks & Friends, the intensity of seeking out items returns in a revamped, socially focused hidden objects game against friends and strangers.

And now, Jump to Medieval continues the fight to stop the Zoorgs in more primitive times. You’ll be taking control of builders, archers and other long range weapons of the Middle Ages to save villages, protect mysterious gems, and more across five different lands in tower defense-style gameplay.

Jump to Medieval – Time Geeks is a universal app compatible with iPad, iPhone, and iPod touch running iOS 3.0 or later, and available in the App Store for $2.99.