My guide will show you how to get every death cutscene, but basically there are 13:
1. Main enemy (get it from death on first screen)
2. Spider (in the sewer or other places)
3. The dog - at the river or a couple of screens before, also in the sewer
4. The worm - In the pool in the robot complex
5. The Centipede - In the robot complex going throught the air vents or in the library
7. Drowning - At the river with the dog, in the sewers or anywhere with water
8. Falling - load of places to do this just fall from any height, can be done about 3-4 screens from the start
9. Steam - I did this in the sewers but there are loads of places
10. Fire - in the air vents
11. Electrocuted - jump on the energy capacitors in the powerstation
12. Crushed - get crushed by pistons in the air vents
13. Explosion blast - in the final level
If you follow my guide this will pop in the final sequence with blasts. If this hasn't popped, use chapter select to unlock. The video shows lots of ways you can get to see the above death cutscenes.
Skip to time block for relevant achievement
04:15 I believe I can, Oh
05:34 Reality Check
07:03 Vertical Escape
08:16 Slice of Fright
20:50 Stone Dignity
21:35 Platform Sip
22:02 Clean Conduct
01:08:10 Fluid Form
01:10:54 Junior Detective
01:18:27 Crumble’s Caress
01:22:10 FAIL Over
01:25:45 Freedom’s Light