Here is the full list of all 20 ROGUS - there are Kingdom of The Lost Souls achievements.
Get a highscore of 5000
Kill 25 monsters using "Acheronian Sword"
Kill 100 monsters using "Reaper Chili Pepper"
Fly for 3 minutes using "Feather of the Dreamer"
Kill 200 monsters with your sword
Kill 25 monsters using "Hiraikom Legendary Beer"
Kill 50 monsters using "Reaper Chili Pepper"
Turn into a rat 10 times using "Wheel-O-Cheese"
Kill 25 monsters using "Apple of Rage"
Turn into a tree 10 times using "Apple of Rage"
Die 25 times
Kill 25 monsters using "Reaper Chili Pepper"
Get a highscore of 1000
Strike a monster with "Hiraikom" while using "Feather of The Dreamer"
Block 50 monsters' magic fire with your shield
Kill 50 monsters with your sword
You know you can't resist it
Go back to the shadows
Your sword randomly hits a monster after you have been killed
Retrieve your teleportation stone