Here is the full list of all 20 NakedMan VS The Clothes achievements.
Die for the first time
Beat the first level in a good time
Beat the first world
Beat the second level in a good time
Beat the second world
Beat the third level in a good time
Beat the third world
Beat the fourth world
Beat the fourth level in a good time
Beat the fifth level in a good time
Beat the fifth world
Beat the game
And your patience
Die a hundred times
Die five hundred times
Die, die, die
Or at least, pour it from the bottle...
You do really like that level, don't ya?