Earthworm Jim HD
12 Achievements
200
8-10h
Atom Jefferson
Collect 500 atoms (without exiting the game)
15
How to unlock the Atom Jefferson achievement in Earthworm Jim HD - Definitive Guide
Start by jumping left and grabbing back onto the starting platform - this will net you 4 extra orbs. Then jump off to the right and when you come to the Y, take the right path and then stay right in the open area with single spikes and finally take the left at the next Y. You can either restart here or continue for a short bit - I usually stopped at the third hornets nest.
Pause, select 'Restart Level' and repeat.
Simply collect 500 atoms without exiting the game. Easily obtainable with normal playthrough. This might require multiple playthroughs. If you do not collect 500 atoms on your first playthrough of the game, simply select "Continue" from the Main Menu and replay any of the levels to collect more atoms. Here is an easy method suggested by M0KKAN:
This can be done pretty quickly by repeating the intro to Buttville. Collect as many blue orbs as you can while helicoptering.
Start by jumping left and grabbing back onto the starting platform - this will net you 4 extra orbs. Then jump off to the right and when you come to the Y, take the right path and then stay right in the open area with single spikes and finally take the left at the next Y. You can either restart here or continue for a short bit - I usually stopped at the third hornets nest.
Pause, select 'Restart Level' and repeat.