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