This game may contain content not appropriate for all ages,
or may not be appropriate for viewing at work.

The developers describe the content like this:

“Zero-Sum Heart contains mild depictions of self-mutilation, violence, harassment, non-consensual kissing, verbal abuse, and murder. For more details and context, please read the content warning under the "About this game" section above.”

By clicking the “View Page” button below you affirm that you are at least eighteen years old.