4399

4399, or 4399.com, is a Chinese online gaming portal that hosts a large catalog of free-to-play titles, with a strong focus on browser-based games and mobile releases. The site functions as a discovery platform where players can browse by genre or popularity, play games directly in a web browser or via mobile apps, and engage with titles through ratings and comments. It also provides a publishing channel for developers to submit and distribute games to a broad audience.

Originating during the era of browser and Flash games in China, 4399 became one of the best-known platforms for casual online gaming. As technologies shifted toward HTML5 and mobile, the site expanded its catalog to HTML5 games and mobile titles, adapting its distribution tools for both PC and smartphone ecosystems.

Features include genre categorization, search, rankings, and user interactions, with thousands of titles spanning action, puzzle, strategy, role-playing, and arcade games. Revenue is primarily advertising-based, with additional monetization within hosted games. Developers can publish games through 4399's platform, reaching users across devices.

Impact and scope: 4399 has played a significant role in China's browser and casual gaming landscape, contributing to the growth of indie and in-house titles and shaping the early mobile gaming ecosystem. It remains a major portal among similar sites and competes with other game stores and platforms by offering a centralized library of free-to-play games.