Here is the full list of all 37 Sentry City achievements.
You killed 20 Flying Drones!
You have died 50 times!
You killed 5 Flying Drones!
You killed 1 Tank Bot Shield
You killed 20 Jumping Drones!
You killed 20 Walker Shooters!
You jumped 100 times!
You have died 10 times!
You jumped 50 times!
You killed 5 Jumping Drones!
You killed 10 enemies without being detected!
You killed 5 Walker Shooters!
You jumped 10 times!
You beat the first boss!
You killed 5 Shooting Drones!
You killed 5 Robo Canons
You killed 1 Tank Bot Gun!
You have acquired a gold speed rating!
You got the bad ending!
You got the good ending!
You killed 50 Walker Shooters!
You killed 50 Jumping Drones!
You killed 10 Shooting Drones!
You killed 10 Robo Canons
You killed 3 Tank Bot Shield
You killed 5 Tank Bot Shield
You killed 3 Tank Bot Gun!
You killed 5 Tank Bot Gun!
You beat the second boss!
You beat the third boss!
You have died 100 times!
You have died 1000 times!
You jumped 1000 times!
You have acquired five gold speed ratings!
You have acquired ten gold speed ratings!
You killed one of each normal enemy!
You killed 50 Flying Drones!