Found once at the very beginning of the game.
- Blue Eye
All of the above are found in Darsov Shire and several other locations during day or night.
Mini-boss in a house in Arkos when choosing the “Never” option when asked to blow up the dam.
- Red Eye
Found all over the place.
All of the above can be found in the Darsov Shire dungeon among other places.
All of the above can be found in several of the main dungeons.
- Deep One
Deep One is exclusive to the Stormheim Shore dungeon.
Mainly found in the Mount Kastka dungeon.
Mainly found in the Kadjanto Peak dungeon.
Can only be found in the dungeon exclusive to the Ultimate Good ending.
Can only be found in the bonus dungeon exclusive to the Future ending.
Can only be found in the Dreamscape, which you access from a quest in Kastski.
- Vile Knight
- Great Imp
Can only be found in the extra mini-dungeon in Stormheim Shore.
Exclusive to the last boss encounter of the Ultimate Good ending (AFAIK).
Found immediately east of Arkos, only during the night. Not 100% sure if you need to pick a specific option in order for its entry to be added, since you can kill him both ways.
Mini-boss of the barn quest that you can get in Darsov.
Only encountered at night in various places on the overworld.
Can only be encountered during a quest in Kastski where you’re asked to get rid of a skeleton, need to pick the Slay option.
Cultists are encountered on many occasions, mostly when doing a Good or Ultimate Good playthrough, Lancers seem to be very rare (I only have two kills) so they are probably exclusive to the late quests during those routes. HighPriests are exclusive to those late game Ultimate Good quests.
All of the above are killable during the final quests when doing an Ultimate Evil playthrough.
Exclusive to the Ultimate Evil route, need to choose the Kill option near the end of the route (Other option gives a bonus ending).
Exclusive to the Good or Ultimate Good routes, one per playthrough.
Killable during the final quest when doing an Ultimate Evil playthrough.
Killable during an Evil or Ultimate Evil route, you will be asked to kill him for an early Evil quest and you will have to choose to do it to confirm the kill.
Exclusive to the Ultimate Evil route, will die as part of the last quest for that route (IIRC).
The possessed priest that you will be asked to find an exorcist for. You can attack him while he’s hovering.
Killable in the Urzon Citadel when doing a Good or Ultimate Good playthrough.
Will be killed as part of a quest during an Ultimate Good playthrough.
- Scorpion (EASY TO MISS)
The ballista that can only be found in a specific hallway that is only accessible at the end of the Ultimate Evil playthrough, needs to be destroyed in addition to the guard manning it.
Mini-boss exclusive to the end quests of the Ultimate Evil route.
Can be attacked at night, found at the East of the Darsov Shire, will have to be killed in order to get to Gregor.
- Skeleton Knight
Mini-boss of a quest in Darsov where you’re asked by the inn keeper to kill the monster attacking the grave of a relative.
Killed as part of the mandatory starting quest.
Only killable if you chose to “Slay” Remus earlier as part of a quest in Kastski, will appear close to the Kadjanto Peak dungeon.
- Armored Aberration
Will die as part of a quest exclusive to the Ultimate Good route where you need to defend Darsov. You might need to actually hit it for it count in the compendium, even though you’re technically not killing it yourself.
- Champion of Rot
- Bubonic Aberration
Both are found in the Kadjanto Peak dungeon.
- Biomechanical Horror
Killable in the bonus dungeon exclusive to the Future ending.
- Unholy Abomination
Killable in the dungeon exclusive to the Ultimate Good route.
- Crypt Skeleton
Found in the bonus mini-dungeon in the Combbelton Cemetery, need to be on the Ultimate Good or Evil routes.
Boss of the bonus Stormheim Shore mini-dungeon.
- Faceless One (EASY TO MISS)
Answer “Never” to the hermit in the lone house in the shores of Upel, that is only accessible during the day.
- Lord of Maggot
Boss of the bonus Combbelton Cemetery mini-dungeon.
Boss found in Danielle’s basement in Valeshire where you learn the downward attack.
- Corrupter of Mind
- Champion of Hell
- Hell Cherub
- Hell Monarch
- Ancient Wurm
- Baron of Decay
All of the above are found in the dungeon exclusive to the Ultimate Good ending.
At the beginning of the game, try to help the man who asks you to kill him.
Boss of the Darsov Shire main dungeon.
Boss of the Combbelton Cemetery main dungeon.
Boss of the Stormheim Shore main dungeon.
Boss of the Mount Katska main dungeon.
Boss of the Kadjanto Peak main dungeon.
Boss of the Future ending.
Boss of the Dreamscape mini-dungeon, only accessible during a quest in Kastski that requires an elixir.
- Paimon True Form
Only killable if you fought Paimon earlier, and with a quest from Arkos.
End boss of the Good or Evil routes.
End boss of the Ultimate Good route.
End boss of the Ultimate Evil route.