Bulletstorm

For this achievement you must obtain 3 stars on 10 different echoes in Echoes Mode.

Echoes Mode is basically a replay of a portion of a specific level of the game. The goal is to get a high of a score as possible.

The main motivators for your score are beating the "target time" and amassing different skill shots during your Echo run (try and use as many as possible, as newly used skill shots yield a higher score, where when you repeat them the score will be lower).

The game comes loaded with 14 different echoes, if you have the Epic Edition, you will have access to more bonus echo levels after getting your online pass.

Here is a score card of what you will need for 3 stars on the original 14 echoes:

1- Desert - 4,000
2- Hideout - 7,000
3- Club - 9,000
4- Rooftops - 8,000
5- Marina - 7,000
6- Forbidden Zone - 6,500
7- Park - 7,500
8- Collapsed Building - 8,500
9- Monorail - 9,000
10- Mall - 9,000
11- Downtown - 6,000
12- Storm - 8,000
13- Spaceport - 10,000
14- Jumpship - 9,000

For guides on getting the 3 stars check out this awesome solution:

Solution for Supernova In Bulletstorm

Toast gravy has done an incredible job on this.

I personally used his guide (besides a few tweaks) and yielded 3 stars everytime I followed his guide.

Keep up the persaverance and this one will be in the bag.