What are your toughest one, two or three EM goals/accomplishments?
In my collection, I'd have to say... in no particular order:
1) Atlantis - scoring over 100k/rolling the reels. Never's happened.
2) Wagon Train - lightning both feathers. Happened twice.
3) Buckaroo - lighting all seven numbers. Happened twice.
Honorable mention to Quintette. I hit the 1-6 bumpers once, but it's my newest pin.
There are some tough 'modes' to conquer with EMs!