Here is the full list of all 17 Primal Light achievements.
Complete Stage 1.
Complete Stage 2.
Complete Stage 3.
Complete Stage 4.
Complete Stage 5.
Complete Stage 6.
Complete Stage 7.
Complete Stage 8.
Complete Stage 9.
Collect all max heal upgrades.
Collect all max health upgrades.
Collect all charms.
Complete the game on HARDCODE mode without using a continue.
Complete the game on RELAXED mode.
Complete the game on VETERAN mode.
Complete the game on HARDCORE mode.
Complete the game without dying.