The Nightmare Mode Title update for Virus at Home has 11 achievements.
Go outside.
Reach level 5 in nightmare mode,
Reach level 10 in nightmare mode.
Reach level 15 in nightmare mode.
Reach level 20 in nightmare mode.
Reach level 25 in nightmare mode.
Reach level 30 in nightmare mode.
Reach level 35 in nightmare mode.
Reach level 40 in nightmare mode.
Reach level 45 in nightmare mode.
Reach level 50 in nightmare mode.