Microsoft recently listed some of the hardest achievements on Xbox 360. If you are relaxing on this lazy Sunday, just try earning some of these achievements. Some of them are really hard. For example, the first achievement listed below will be awarded when you kill no fewer than 10,000 people in ranked multiplayer sessions on Gears of War. And another in Halo Reach when you complete all mission in the game with Legendary Difficulty.
Game: Gears of War
Achievement: “A Monument to All Your Sins”
Achievement: “No Point in Dying”
Game: Duke Nukem Forever
Achievement: “Balls of Steel”
Game:South Park: Let’s Go Tower Defense Play
Read about each of the achievements in detail from the link below.
Source: Xbox Wire