Is it a sin to watch Berserk?

Berserk is a dark fantasy anime/manga series involving violence, warfare, demons, sexual content, and disturbing themes.

We're now going to evaluate it using the following simple but effective test:

1. Does it glorify God?

No. Its content frequently centers on extreme violence, demonic imagery, sexual immorality, and other things that do not honor God (Ephesians 5:3–4; Philippians 4:8).

2. Can I do this without being tempted to sin?

Depends. The series contains graphic sexual material, nudity, brutality, and disturbing imagery that can strongly tempt a Christian toward lust, impurity, or dwelling on evil, though if you only watch the 1997 anime, the bad stuff is much more restrained, and the creator of TheSinCheck vouches for it being good to watch to learn lessons.

3. Could I do this with Jesus Christ next to me?

Depends. Given the explicit sexual content, extreme violence, and demonic themes, it would be difficult to honestly say that watching it is consistent with following Christ's call to pursue purity and holiness, unless you watch the 1997 anime version.

So, yes, it is a sin to watch Berserk, unless you specifically watch the 1997 anime version.

The problem is not simply that it is fictional or violent; the content itself (specifically the manga and later anime series) includes substantial material that conflicts with biblical purity and what Christians are commanded to set their minds upon.