SORRY IF YOU CAN SEE WHAT I WROTE BELOW THE SPOILER I DONT THINK IT WORKED* 
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*I PUSHED IT LOWER JUST IN CASE 
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I put it in a Spoiler Warning just incase... If you havent read the comic or seen the movie and dont want anything to be spoiled do not click the spoiler below. Im not sure how accurate i am 

I just watched All-Star Superman and while it has been a while since i read the comic i thought he

No, Samson and Atlas were at the beginning of his feats, but, yeah, they did skip a few.

"it was from Samson and Atlas (as shown in the movie) that he found out he was even supposed to complete the feats...answering the unanswerable question was his first feat where the readers even knew there were any feats if I recall correctly...however, according to Morrison himself, these are the twelve feats:  
 
the movie skipped over half of them but it wasn't the point of the movie

1. Superman saves the first manned mission to the sun.
2. Superman brews the Super–Elixir.
3. Superman answers the Unanswerable Question.
4. Superman chains the Chronovore. 
5. Superman saves Earth from Bizarro–Home.
6. Superman returns from the Underverse.
7. Superman creates Life.
8. Superman liberates Kandor/cures cancer.
9. Superman defeats Solaris.
10. Superman conquers Death.
11. Superman builds an artificial Heart for the Sun.
12.Superman leaves the recipe/formula to make Superman 2.    

"

" Didnt he also meet Kal Kent and sees his future self? "