Here is the full list of all 20 Ninja Roquinexu achievements.
Warehouse Complete level one.
Stop the demonic invasion.
Tracking Juruza.
Evergrey Terrace.
Destroyed GFV plant.
Make a diversion
Complete mission in the desert.
Stop extortion.
The contract is not executed.
Enemy or friend?.
Coal, coal and coal.
Visiting Slashbones.
Still alive...
Stopped pollution.
You kept the promise.
Beat all challenges.
Play secret mini game.
Beat Vickford Stone on hard difficulty.
Agent Klarx unlocked.
Not alone.