My medal ideas:
“Shopping maniac” buy every Item avaiable in the game shops
“Grill hero” sell 10k food to a space burger in a single time
“Hero we deserve award” complete a 100% difficulty mission perfectly (no filled slots, no satellites used, no overheat)
“Galactic challenger” try all the missions in the game
“Galactic hero award” granted if you win all the missions in the entire galaxy (really hard)
“Chichen hunter licence” a medal just to show that a player own the license
“Beta tester” well… a medal granted to all of us?