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