Here is the full list of all 33 Sector Sweep achievements.
Play a game as the Hunter.
Play a game as Masty Mongrel.
Play a game as Sergeant Curlicue.
Play a game as Charlie the Robot.
Take 150 damage.
Play 5 times.
Unlock Loadouts by achieving 25th level.
Survive for 12 minutes as the Hunter
Survive for 12 minutes as Masty Mongrel.
Survive for 12 minutes as Sergeant Curlicue.
Survive for 12 minutes as Charlie the Robot.
Survive for 20 minutes.
Deal a Total of 1 Million Damage.
Acquire 6th Tier of Scarier Bullets Upgrade.
Acquire 8th Tier of Burst Gun Weapon.
Acquire 8th Tier of Land Mines Weapon.
Acquire 8th Tier of Piercing Beam Weapon.
Acquire 8th Tier of Orbital Drone Weapon.
Collect 1500 SpaceCoins.
Collect 5000 SpaceCoins.
Collect 15000 SpaceCoins.
Defeat 5000 enemies as the Hunter.
Defeat 5000 enemies as Masty Mongrel.
Defeat 5000 enemies as Sergeant Curlicue.
Defeat 5000 enemies as Charlie the Robot.
Defeat 10000 enemies.
Defeat 50000 enemies.
Achieve 50th level.
Complete all character-specific unlocks for the Hunter and acquire 8th tier of Burst Gun.
Complete all character-specific unlocks for Masty Mongrel and acquire 8th tier of Anti-Personnel Mines.
Complete all character-specific unlocks for Sergeant Curlicue and acquire 8th tier of Piercing Beam.
Complete all character-specific unlocks for Charlie the Robot and acquire 8th tier of Action Drone.
Collect all other Achievements and Unlocks.