Arqade is a question and answer site for passionate videogamers on all platforms. Join them; it only takes a minute:

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

Challenges 9 and 10, Isaac was good today and The purist, require you to kill respectively Satan and Isaac. Do these kills count towards Isaac's achievements, Mom's Knife and The D20?

share|improve this question
This is indeed interesting. Too bad I can't figure this one out myself (I have already beaten both Satan and Isaac as Isaac). – Aubergine Jun 19 '12 at 7:31
@Aubergine Me too, that's why I'm asking... I could try playing the game back from scratches, but it would take too long. – Kappei Jun 19 '12 at 7:34
well you could delete your progress and start anew... – Zommuter Jun 24 '12 at 14:57
up vote 2 down vote accepted

Yes, they do. I got the achievement for beating Isaac with Isaac after doing it in a challenge.

share|improve this answer
Thanks, that's exactly what I wanted to know. – Kappei Jun 20 '12 at 21:42

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.