Can be either XBLA or full retail games, what achievements are you probably never going to get?
My top 3 XBLA...
3. Hexic. Grand Pearl Pooh-Bah. 25g.
Surround one piece with six black pearls.
Yeah right. I've never made a black pearl, so what chance I am going to make 6... and then manage to get them in a nice hex shape around a single piece? I'll tell you what chance, no 'kin chance. I doubt I'll ever get the 3 black pearls achievement. Withut a lot of practice I'll never even make a black pearl. Well solid.
2. Smash TV. Game Master. 50g.
Finish the entire game without continuing while using default settings.
Everyone dies on Smash TV. It was designed as a quarter sucking arcade machine. You are supposed to die. In some places you have to die, like the bosses. They don't play fair, sometimes they just cover the half of the screen you are on, and you die. Nowt you can do about it. Impossible. Doubly so as its glitched. But even if its patched, it will not be done.
1. Ikaruga. Unstoppable. 25g.
Clear the game in any mode without using Continue.
I reckon about 0.0001% of people who have Ikaruga will get this. Once past the first level, which isn't easy by any means, you just get crushed into the floor time after time after time. Most people will never even finish Ikaruga without free play, let alone without using a continue. You will need to slowly, painstakingly learn each sub-section of each level, and even then putting it together into one run will take super human effort for anyone who isn't a DC \ Gamecube vet. WELL SOLID INNIT!!!!
What are your own personal well 'ard achievements?