So based off ratios my hardest achievement is
Halo Wars- Adjudicate the Arbiter
Complete the Campaign on Heroic Difficulty
with a ratio of 2.28 which is surprising. Although I have to say I thought the Trials HD achievement
Demon on Wheels
The Player has completed all Extreme tracks. (ratio 2.27)
would have had a much higher ratio. That last level is such a bitch to beat.
The definitive evidence that video games turn people into mass murderers








