Here is the full list of all 39 uDraw Studio: Instant Artist achievements worth 1,000 gamerscore.
Completed all 40 Tilt Mazes with a total time of less than 40 minutes
Completed 2 Levels in a row without losing a Life in the Alien Splat Game
Complete Level 10 in the Alien Splat Game
Obtained 6 lives in the Alien Splat Game
Completed Level 1 in the Alien Splat Game
Completed Level 5 in the Tilt Painting Challenge Game
Completed Level 10 in the Tilt Maze Game
Explored all Art Starters
Used all the colors in the Palette Wheel in Tilt Painting Freeplay Mode
Explored any Art Starter
Saved a Custom Palette
Completed Level 3 in the Tilt Painting Challenge Game
Completed Level 1 in the Tilt Painting Challenge Game
Explored all Art Camp Activities
Completed a Tilt Maze in 60 seconds
Completed Level 1 in the Tilt Maze Game
Saved a Connect The Dots Painting in the Gallery
Saved a Numbers Painting in the Gallery
Saved a Coloring Book Painting in the Gallery
Watched a Slideshow of your Gallery Paintings
Created a Signature Stamp
Saved a Painting with all of the Different Canvas Types
Complete all Art School Lessons
Completed three Color Lessons in Art School
Completed three Painting Lessons in Art School
Completed three Drawing Lessons in Art School
Completed any Art School Lesson
Dragged and Dropped a basic color into the Palette Wheel
Painted with Each Brush Type at least once
Painted with the Fingerpaint Brush
Created artwork using an Animated Stamp
Exported a Painting
Painted with the Splatter Brush
Painted with the Calligraphy Pen
Selected a Different Stroke Mode in the Brushstroke Menu
Activated the Lock Palette feature
Applied an Effect Filter to a Painting
Activated an Extended Tool Tip
Saved a Painting in the Gallery