1. Percy doesn't hear the great prophesy till the last book, not the second.
2. The andromida is a huge cruise ship with an army of monsters, not a yacht with ten guys.
3. Tyson is way to freakin smart in the movie. The books he has an iq of about 15.
4. Grover was gone from the beginning, not kidnapped by luke halfway.
5. The guardian of the sea of monsters does not swallow them.
6. I guess were pretending circes island spa was never there ever?
7. Hermes gives them magic vitamins, not a tape gun.
8. No blackjack?
9. There is no amusement park on the cyclopes island.
10. The chariot of damnation takes them to camp halfblood, not Washington dc.
11. Mist does not come in little bottles of colon.
12. The prophesy happens on his 16th birthday, not his 20th.
13. Even if they did decide to bring up kronos, HE DOES NOT TRY TO EAT LUKE.
14. The thermos from hermes has a few uses. Its not unlimited winds.
15. The cursed blade is not Percy's sword.
Okay did i miss anything?? I know that movies have to take parts out and i understand it is to make to movie shorter. But is it really nessecary to change the whole freakin story?!?!?