The Witcher: DuelMail is centered around battles between two players digitally incarnated as one of three completely different character classes. Winning consecutive fights against other real-world people gains the player experience which allows them to advance to higher levels of character development, along with gaining new skills and items to use in combat. Players queue up attacks, magical spells and defensive maneuvers, then send their challenges to other players, who must create their own counter sequence in hopes of being the last one standing. In order to join, the game requires only a PC with an internet connection and a web browser with Flash installed.

What distinguishes The Witcher: DuelMail from a large number of similar Flash games is the high level quality throughout, which would usually be found in higher-budget products. The company responsible for The Witcher: DuelMail’s development, one2tribe Company, has been able to include spectacular battle visuals with high-quality animations created using motion-capture technology, as well as extraordinary special effects along with full sound implementation.