Here is the full list of all 18 Armikrog achievements worth 1,000 gamerscore. It takes around 2-3 hours to unlock all of the achievements on Xbox One.
Watch all of the Mongrel window movies
Beat the Game
Solve the console puzzle in Emerald Room
Collect all P-tonium Pieces from P
Use all Father Statues
Pull lever to activate language translations
Start All 4 Engines
Solve 10 Puzzles
Solve the Robot Puzzle
Use Beak Beak to discover the Hall of Heroes Names
Solve the JeffersAnt Puzzle (give him the feather)
Solve 5 Puzzles
Solve the puzzle in the Scaley Room
Activate/enter the first Zipkicker
Find P
Read all of the stories in Hall of Heroes (click each of the 8 panels)
Find the Hot Rod Zipkicker
Beat the Game having solved all puzzles and find Hot Rod Zipkicker