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