Freyr’s review published on Letterboxd:
Not the best animation, and it does feel overlong (possibly due to a very disjointed and slow paced start). However, there is plenty of action, tension and drama here, with an interesting cast of characters. I was also pretty surprised with one of the twists, which is a plus. Not quite as consistently engaging as Train to Busan itself, but not a bad companion piece by any means.