Universe is a game with tons of medals and I’m surprised that there is no reward/incentive to complete long and hard missions in just a single sitting istead of playing hard and short missions.
So here is my idea: The persistence award, granted if you complete an elite mission with a lenght of 35 (Or more) waves in just one sitting
It may looks like this:
This medal should get a “better” version: The “Extreme persistence award”, granted to every player that manages to finish the weekly challenge in just a single sitting.