Here is the full list of all 27 Gear Up achievements.
Back playing after more than one week of Gear Up absence.
Repair 30000 armor in lifetime.
Destroy 1500 enemies
Recieve 500 damage without being destroyed in a round.
Win 20 deathmatch rounds.
Win 20 conquest rounds.
Win 20 team deathmatch rounds.
Destroy 100 enemies
Destroy 75 enemies
Win a TDM round overwhelmingly, with a ratio of 4:1 or higher.
Destroy 20 enemies with the Grayhound (saws).
Win 3 conquest rounds.
Repair (1250) armor in one round of a team game mode.
Destroy 50 enemies
Win a Conquest round overwhelmingly, with a ratio of 4:1 or higher.
Destroy at least seven different opponents in a team game mode.
10 kills in a row
6 kills in a row
Destroy 25 enemies
Assist in capturing at least 20 conquest towers in a single round.
Drown in the water at least once.
4 kills in a row
Destroy 10 enemies with the default starter cannon.
Killed a deserting enemy
3 kills in a row
2 kills in a row
Capture a conquest tower together with 3 or more teammates.