Here is the full list of all 22 Space Rocks Blaster achievements.
Complete all challenges
Destroy 10 enemy ships in any single game
Destroy 20 enemy ships in any single game
Earn total score of 100k
Unlock all ships
Destroy 10 enemy ships over any number of games
Unlock another ship
Destroy 5 enemy ships in any single game
Earn total score of 10k
Destroy 1000 asteroids over any number of games
Get a score of 10k in any single game
Destroy 500 asteroids in any single game
Get a score of 1000 in any single game
Get a score of 5000 in any single game
Destroy 200 asteroids in any single game
Complete 1st challenge
Destroy 100 asteroids in any single game
Earn total score of 1 million
Destroy 10k asteroids over any number of games
Destroy 100k asteroids over any number of games
Destroy 100 enemy ships over any number of games
Destroy 1000 enemy ships over any number of games