Full list of all 12 Quake Arena Arcade achievements worth 200 gamerscore. It takes around 20-25 hours to unlock all of the achievements on Xbox 360.
Frag 1000 opponents.
Knock someone to their death in a multiplayer match.
Capture 3 flags in one match.
Win 5 ranked matches.
Get a frag with each weapon.
Challenge and defeat Xaero in Campaign Mode.
Frag an opponent with the Gauntlet while they have the Quad Damage power-up.
Pick up one of every item.
Get a frag after dying, before respawning.
Get a frag.
Frag everything that isn't you in 500 multiplayer matches.
Unlock and conquer every arena in Campaign Mode on difficulty level 4 or higher.