Meh.. The Hard achievement is way too easy. Maybe if it was getting a 100% complete with all weapons purchased and fully upgraded.. But even then, it only took me a few hours to do that.
No badge? Go to Chapter selection and replay last scene. Repeat until You get a badge. C o p y-p a s t e this message if it's on bottom of the comments page : )
By the way, I like the suggestion below (I did not create it, I take no credit for this advice) Ok for all of you that need to know how to beat the final boss, here we go. Weapons: Short Shield, Lightning, Slow Time. All you have to do is use the slow time as soon as you can. Get on top of him and use all of your lightning and your short shield. That should beat him. The thing is that you HAVE to do this as fast as possible so you don't loose all you life and explode. Keep this going.
 "Epic Battle Fantasy 3"){kind=icon}
 "UPGRADE COMPLETE!"){kind=icon}
 "The Last Stand 2"){kind=icon}
 "Hedgehog Launch"){kind=icon}
 "Bunny Invasion: Easter Special"){kind=icon}
 "Gray"){kind=icon}
 "Meat Boy"){kind=icon}
 "Johnny Rocketfingers"){kind=icon}
 "Heavy Weapons"){kind=icon}