Here is the full list of all 22 The Panel DC achievements.
You have completed the first puzzle.
You have completed the second puzzle.
You have completed the third puzzle.
You have completed the fourth puzzle.
You have completed the fifth puzzle.
You have completed sixth puzzle.
You have completed the seventh puzzle.
You have completed the eighth puzzle.
You have completed the ninth puzzle.
You have completed the tenth puzzle.
You have completed the eleventh puzzle.
You completed the twelfth puzzle.
You completed the thirteenth puzzle.
You have completed the fourteenth puzzle.
You have completed the fifteenth puzzle.
You have completed the sixteenth puzzle.
You have completed the seventeenth puzzle.
You have completed the game.
You have completed the game under six minutes.
You found the GK2 easter egg.
You have completed the game under five minutes.
Can't Touch Me