River Game HK Limited is the company behind the official site for Top War: Battle Game, a free-to-play mobile game available on Android and iOS. The game invites players to merge items to upgrade and take part in its battle-themed experience. Its official site highlights a range of themed content and promotions, including a Transformers collaboration, Halloween and Christmas events, and the Top-Star Championship. Visitors can also find sections devoted to characters, a movie, and game systems, offering an introduction to the game and its featured content.

Top War: Battle Game requires Android 4.1 or later, or iOS 8.0 or later, and an internet connection to play. While the game is free to download and play, it offers in-game purchases. River Game HK Limited provides access to the game’s terms of service, privacy policy, and European data protection compliance certificates through the official site. The site presents Top War as its featured title and directs players to enjoy the game and explore its events and updates.