Here is the full list of all 22 White Noise Online achievements.
Finish 5 online games
You tried to pause while being frightened
Pick 100 tapes
Walk a total of 42,195 meters
Finish an online game
Finish an online game with 4 women characters
Lose the game having found 7 tapes
Win a game
Pick 200 tapes
Win an online game with 4 players
Finish 10 online games
Finish 20 online games
Win a game on nightmare difficulty
Win a game in less than 6 minutes on Normal or higher difficulty
Unlock all characters
Win an online game being the only player alive
Win a 4 player online game with 4 survivors
Win a 4 player online game with the default characters
Win a game without running
Win an online game without picking any tape
Lose an online game having all players dead at the same time.
Win a 4 player online game with each player picking 2 tapes