Most Gamers Are Male

Guy 1: "I-I only play it for the fighting. I-I appreciate the expansive multi-tier environment, and the sixteen characters...the pixel-shaded bump-mapping...and the rich plot development. Seriously, why else would I play it?"
Guy 2: "She kicks high."
—From the Fanservice-filled Dead or Alive 3 commercial for the Xbox

This trope holds that the primary demographic for video games is males ages 15 to 25, which explains why games are full of male-only Fanservice, especially in the form of Stripperiffic female characters, gratuitous violence, and concepts that are oriented more to explosions and racking up a high body count than plot or character development.

There is a lot of historical context behind this trope. Young male gamers traditionally being the vast majority of gamers, though demographics are changing. Female Gamers now make up to 45% of people playing video gamers and the average age of people playing video gamers continues to rise. However, the core audience for games such as Shooters, Racing games and Action RPGS remains younger males aged 20 to 35. Those types of games are usually the first types of games associated with gamers. This is likely due to the popularity and controversy of video games such as Call of Duty and Grand Theft Auto which have made them well known even among non-gamers. There is an increasing number of females playing these types of games, but the player base remains mostly male.

See also Rated M for Money and Male Gaze. Compare and contrast Gamer Chick and Otaku Surrogate.