Just nock an arrow and shoot it. How hard could it be?

Hit a target

Completed all rounds in Berserker

Shoot the small red apple without killing the Apple Head in Don't Miss

Exterminate all 10 eggs in Eggsterminator

Kill 2 onlookers and break the rope in "The Noose"

Hit the bullseye on a target

Fire arrows a cumulative distance of 20 kilometres (that's 12.4274 miles for the metric deprived)

Kill a total of 50 opposing archers in Team Deathmatch

Finish Wave 8 in Horde mode

Score 10 goals in Zoccer while versing other players

Kill 10 opposing players in Zoccer

Kill 50 zombies in Zoccer

Hit 3 targets with 3 separate arrows within 3 seconds of eachother