Here is the full list of all 17 Gurney to Gurney achievements.
Destroy 1000 enemies.
You completed the game
You have 75 wins
Destroy 500 enemies.
Half way
Defeated enemies 25 times
Destroy 100 enemies.
Already 10 wins
Destroy 50 enemies.
You have 5 wins
You have purchased 10 upgrades
Destroy 10 enemies.
Destroy 5 enemies.
Your first victory
Destroy 1 enemy.
You have purchased 5 upgrades
You purchased your first upgrade