10 Difficult Xbox Achievements That Are Not Worth It

2. Gears of War 2 – Seriously 2.0

Though it allows you to attempt the challenge in any and all game modes in Epic's Gears of War 2, The Seriously 2.0 achievement still requires you to make 100,000 kills. Whilst the Gamerscore payout is pretty tasty, this is an achievement that will take even the most skilled of gamers a great deal of time indeed. You really need to ask yourself, “is it really worth it?”