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