Here is the full list of all 19 Scud Frenzy achievements.
Earned 30 Scud medals
Earned 60 Scud medals
Earned 90 Scud medals
Earned 120 Scud medals
Earned 168 Scud medals
Unlocked all Scud heads
Unlocked all Jets
Destroy 1000 explosive crates
Collect 2500 items
Destroy 1000 star crates
Collect 100 guns
Destroy 250 vending/arcade machines
Add 5 minutes to the clock
Jet around a lot
Get 10,000 points without touching the ground
Kill 100 Zimzons
Kill 1000 Monsters
Shoot 500 bullets at the crust of a fat thing
Collect 300 Dreamstones