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