Grimrock

- more NPC's and side quests

- enemies fighting with others creatures, for example orcs defending their camp from undead attacks

- bodies don't magically disappear but stays on the ground

- less puzzles more fight, puzzles should be mostly for secrets

- XP for finding secrets

Orcs - classic enemies, always fun! Lizardman's/Minotaurs/Insectoid's - with different weapons and armors. Bandits/Grave-robbers/Renegades/Outlaws/Thief's/Cultists/Thugs/Marauders/ - also from different races. Demons - probably very difficult opponents. Vampires - hey dungeons are full of them! Were...