Here is the full list of all 14 Simona's Requiem achievements.
Die 3 times in Time lord fight
Finish the game
Beat the final boss
Find all epitaphs
Beat the False Custodian
Get all upgrades
Get the teleport crystal
Speak to every inhabitan once
Get fire upgrade
Beat the Time Lord
Get the dash upgrade
Beat the Death Mask
Get the double jump upgrade
Find one epitaph