Each level consists of a picture. The picture is an iconic image from something that came from the 70s. Underneath the picture are a batch of letters. Your objective is to spell out what the image is, in order to advance to the next puzzle. Each completed level earns you coins that can be used to purchase boosts in the virtual store.
There are three boosts are available to help you out, in times of trouble. Expose A Letter will reveal one of the letters in the secret word. Remove Letters will eliminate all of the letters in your pool that aren't needed to spell out the secret word. Solve This Question will automatically give you the answer and advance you to the next level.
If you should run out of coins and get stuck, you'll need to check out a cheat site to get you back on track. Guess The 70s Answers is a nice and tidy site that has all of the solutions set up in easy-to-find and organized sections.
If you are a fan of disco, platform shoes and bell bottoms, Guess The 70s is definitely a free app worth checking out. At the moment, this game is available exclusively for Android devices.