Thrill-Seekers are evildoers who are addicted to danger or fast-paced action, often to the detriment of others. They may view danger as an addiction or simply be criminally insane with no regard for personal safety or the safety of others.

Some of them are not actually evil but rather mischievous. However, the term can also be used for the violent phenomena of "Thrill Killing", in which sick people actively torture and murder complete strangers for no reason other than personal entertainment.

Thrill Killers are among the most hated and feared of all criminals due to the motiveless nature of their heinous crimes. Often, they don't even care if they get away or are defeated or even if they live or die, as long as it was "fun". They are often featured in gore and exploitative medias (e.g. Cannibal Holocaust, August Underground, Hostel) and often play as protagonists.