10 Characters Who Have Defeated Darkseid
6. Atom
This could not possibly have been made possible if not for help from the Green Arrow, but it's safe to say that Atom did most of the heavy lifting on this one.
The Rock of Ages story arc depicts an alternate, mystical future. Even in an alternate world, Darkseid is still locked into a bitter feud with the Justice League. In this future, Darkseid is the new ruler of Metropolis and has turned the earth into a dystopian, desolate wasteland.
The JLA are forced to band together. In the midst of battle, Green Arrow teams up with Atom. After the latter shrinks down to the size of an ant, the former shoots an arrow at Darkseid while Atom is on it. This leads Atom into Darkseid's head. While inside, he destroys Darkseid's brain from within.
That isn't the only instance where Atom vanquished the New God. In the Identity Crisis arc, Jimmy Olsen gets taken over by Darkseid. To save his friend, Atom shrinks down to destroy the "battery" containing Darkseid's power. Doing so releases Jimmy from Darkseid's control.