He used both Isaac's and Limitless' heads', and maybe another but I can't remember. The mobs were good, but as someone who knew the people they were references to at a glance, it isn't something I'd particularly like to see again.Quote from Aimoskeeto
The only head he used was Isaac's, though. o_o Otherwise, they were all native enemies, balanced around the areas, added in to the storyline. I agree the graveyard was a bit of a biiiig thing, but the mobs were fine, I think! If only as an experiment.
I know, I'm being a broken record.