Here is the full list of all 25 Unspottable achievements.
Finish a game with no robots left in Arena.
Punch the instructor 3 times in the same game.
Bully someone 10 times in start scene.
Punch the spectator in Meadow.
Use the teleporter 10 times.
Complete a 1 point game.
Punch an opponent under a spotlight.
Punch a player out of the game area.
Punch all bots in start scene.
2 players were punched in 2 seconds.
All players get punched by robots.
Complete the tuto.
3 players were punched in 2 seconds.
Complete a 99 points game.
Unlock all characters.
Win a game without any opponents scoring any points.
Draw a game.
Leave the restaurant during your distract.
All the players got punched as they were about to leave.
All players have been crushed.
All players have been punched when the lights were off.
Turn off the light 10 times in a game.
All bots killed by bombs.
All players killed by bombs.
All players punched by instructor.