Full list of all 73 Saints Row IV achievements. It takes around 35-40 hours to unlock all of the achievements in the base game on Windows.
The base game contains 53 achievements, and there are 2 DLC packs containing 20 achievements.
Kill 25 Aliens with each: Dubstep, InflatoRay, Bounce Gun, Disintegrator, Abduction, and Black Hole.