Ooh, I can come up with plenty for Skyrim:
"Alduin the Fist-Eater" - Kill Alduin without using weapons, Destruction spells, or offensive Shouts. (I.E. With your fists)
"Arachnophobe" - Kill 100 frostbite spiders with fire (magic, Shouts, or enchantments).
"Entomologist" - Have both a frostbite spider and a chaurus as undead thralls at the same time.
"Obvious Troll" - Kill a troll using nothing but an unupgraded iron dagger or shiv without being hit by it.
"Space Program" - Get a giant to help you start Tamriel's first space program. (I.E. Get launched into the air by a giant)
"Peep Show" - Strip someone down to their underwear by pickpocketing them.
"I Can Stop Anytime I Want" - Consume 50 skooma and 50 moon sugar.
"You Monster..." - Comply with Delphine's request. (I.E. Kill Paarthurnax)
"Raining Cats and Dogs" - Kill a canine and a feline using one Storm Call Shout. (Felines can be Khajiit or sabre cats, canines can be dogs, wolves, or werewolves)
"The Chicken or the Egg?" - Kill a chicken with an egg. (Using Telekinesis)
"Get Off the Stage!" - Throw a tomato at a public speaker. (Example: Heimskr)
Man, coming up with this list reminded me of how boring Skyrim's achievements are. It's nothing but completing quests and grinding stuff; I have no idea why they couldn't just add in a few unique, fun ones to break things up.
