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