Ninja Outbreak Achievement List

Golden Adventure Golden Adventure
Override Lockdown of the Xenobiology Lab
Scorpion Thunderbolt Scorpion Thunderbolt
Get the Chain Lightning gun
Full Metal Ninja Full Metal Ninja
Get the Rocket Launcher
Ninja Terminator Ninja Terminator
Beat the Game
Ninja Untouchable Ninja Untouchable
Find All Four Ninja Hearts
Hidden Achievement
Counter Destroyer Counter Destroyer
Hidden achievement descriptions are missing by default. Why is it missing?