Well done on taking the time to construct this! I really like the idea, and it seems the staff have their work cut out for them if they decided to take this idea on board!
Some achievement ideas:
Look in a mirror: Perform Scary Face
Eggcelent Hands: Perform Egg Dance
Air Head: Perform Balloon Head
Just a flesh wound: Get 3 kills while below 10 hp
Old School: Go on a 50 killstreak with the Starter Gun
Leadfoot: Drive from the bottom of Southride to the top of Era City
Mmm... Beans: Fart in 10 players faces.
Catch!: Throw 50 Grenades