The Time Travel Add-on for Coloring Pixels has 21 achievements.
Complete image 4 on the Time Travel book.
Complete image 3 on the Time Travel book.
Complete image 2 on the Time Travel book.
Complete image 1 on the Time Travel book.
Complete image 5 on the Time Travel book.
Complete image 6 on the Time Travel book.
Complete image 7 on the Time Travel book.
Complete image 8 on the Time Travel book.
Complete image 9 on the Time Travel book.
Complete image 10 on the Time Travel book.
Complete image 11 on the Time Travel book.
Complete image 12 on the Time Travel book.
Complete image 13 on the Time Travel book.
Complete image 14 on the Time Travel book.
Complete image 15 on the Time Travel book.
Complete image 16 on the Time Travel book.
Complete image 17 on the Time Travel book.
Complete image 18 on the Time Travel book.
Complete image 19 on the Time Travel book.
Complete image 20 on the Time Travel book.
Complete all images on the Time Travel book.