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