Here is the full list of all 41 Dragon Bobby achievements worth 1,000 gamerscore.
Chapter 01 completed!
Chapter 02 completed!
Chapter 03 completed!
Chapter 04 completed!
Chapter 05 completed!
Chapter 06 completed!
Chapter 07 completed!
Chapter 08 completed!
Chapter 09 completed!
Chapter 10 completed!
Chapter 11 completed!
Completed all the chapters, collected all the orbs and found all the hidden memories
Found all the hidden memories from chapter 01
Found all the hidden memories from chapter 02
Found all the hidden memories from chapter 03
Found all the hidden memories from chapter 04
Found all the hidden memories from chapter 05
Found all the hidden memories from chapter 06
Found all the hidden memories from chapter 07
Found all the hidden memories from chapter 08
Found all the hidden memories from chapter 09
Found all the hidden memories from chapter 10
Found all the hidden memories from chapter 11
Found 10 hidden memories
Found 20 hidden memories
Found all 31 hidden memories
Collected all the orbs from chapter 01
Collected all the orbs from chapter 02
Collected all the orbs from chapter 03
Collected all the orbs from chapter 04
Collected all the orbs from chapter 05
Collected all the orbs from chapter 06
Collected all the orbs from chapter 07
Collected all the orbs from chapter 08
Collected all the orbs from chapter 09
Collected all the orbs from chapter 10
Collected all the orbs from chapter 11
Collected 50 orbs
Collected 100 orbs
Collected 150 orbs
Collected all 231 orbs