Here is the full list of all 25 Super Rad Raygun achievements.
Finished the game without buying any upgrades
More than 7 oil monsters onscreen at once
Ran right off the NYC train
Touched Herr Metal while he's running away in Berlin
Cashed in your convention token for a free battery!
Watched the credits
Carrying 10,000 bits
Maxed out every powerup
Killed a civilian mishyen!
Collected 40 batteries
Finished the game
Finished Managua without shooting any civilians
Reached the checkpoint without using the moving beam in Gdansk
Touched a white snake in the grass
Popped 99 Luftballoons in Berlin
Got hit by a hammer projectile
Earned a 3-UP in Bonus Chance
Killed 10 enemies in a row with the arc cannon.Killed 10 enemies in a row with the arc cannon
Fell in the NYC train gap
Watch a fox in PWS for 15 seconds after he's been saved
Saved 20 animals in Prince W. Sound
Defeated Mad Donna in Washington DC
Listened to the entire world map song
Killed an enemy with a ricochet bullet
More than 20 sprites onscreen at once