Escape games can be an excellent method of getting students involved in learning, but if you don't have the kit with locks, they can be tricky to do. Here's a completely digital escape game - no/low prep, you just need to make sure that your students have access to Google Sites!
This escape activity puts students in the situation of trying to open an uncle's briefcase full of FBI memorabilia. In order to that, they will need to learn about the Watergate scandal and unlock the locks.
Be aware that escape games are meant to be challenging - your students will have to work together, read the clues carefully, and be willing to take risks in order to crack the codes. The teacher's guide includes all of the information and hints you need to help students who get lost along the way.