I show where all the splinters are in my achievement walkthrough
Chapter 1 Splinters
1 - 3:05
2 - 4:30
Chapter 2
1 - 6:30
2 - 6:50
Chapter 3
1 - 12:30
2 - 13:15
Chapter 4
1 - 15:30
2 - 16:50
If you miss any there's no chapter select you'll have to start a new game
but you only have to get the ones you miss