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