0:00 - lvl 01 - Escape!
0:15 - lvl 02 - Out of the cage
0:31 - lvl 03 - Garage sabotage
0:42 - lvl 04 - Going clubbin'
1:00 - lvl 05 - Buffalo cargo
1:19 - lvl 06 - Apartment hunting
1:41 - lvl 07 - Sabway prey
2:02 - lvl 08 - External struggles
2:22 - lvl 09 - Arcade junkie
2:36 - lvl 10 - In too deep
2:50 - lvl 11 - A grim gym
3:17 - lvl 12 - Scrap crap
3:37 - lvl 13 - Hippo-dome
3:59 - lvl 14 - Grocery war
4:24 - lvl 15 - Frost bite
4:48 - lvl 16 - Big bird
5:10 - lvl 17 - Animal farm
5:30 - lvl 18 - Dark labs
5:47 - lvl 19 - The climb
6:07 - lvl 20 - The true alpha

Finding and shooting all collectibles will reward you with 2 relevent achievements: