Full list of all 20 Zombie Attack 2 achievements worth 200 gamerscore. It takes around 8-10 hours to unlock all of the achievements on Windows Phone.
Completed 'Unstable Ground' Challenge level with a grade of 'A' or higher.
Completed 'Aerial Assault' Challenge level with a grade of 'A' or higher.
Completed 'Living Nightmare' Challenge level with a grade of 'B' or higher.
Completed 'Engineer Prodigy' Challenge level with a grade of 'B' or higher.
Completed 'Undead Attrition' Challenge level with a grade of 'B' or higher.
Earned the shotgun for the first time in Survivor mode
Completed 'Eagle Eye Engagement' Challenge level with a grade of 'B' or higher.
Killed a Flesh Beast for the first time in Survivor mode
Killed 200 Zombies in a single game in Survivor mode
Killed 100 Zombies in a single game in Survivor mode
Killed a Cheerleader for the first time in Survivor mode
Killed a Winged Horror for the first time in Survivor mode
Killed a Skinny for the first time in Survivor mode
Killed a Hound for the first time in Survivor mode
Earn a grade of 'S' or higher on the 'Tougher Than Nails' Challenge.
Earn a grade of 'A' or higher on the 'Close Combat Clash' Challenge.
Earn a grade of 'S' or higher on the 'Stone Age Struggle' Challenge.
Earn a grade of 'B' or higher on the 'Poor Equipment' Challenge.
Earn a grade of 'A' or higher on the 'Napalm Warfare' Challenge.
Earn a grade of 'B' or higher on the 'High Tech Horror' Challenge.