In the first 30 days after the system's launch, there will be roughly 10 to 12 games in a variety of genres. By the end of Q1 2005, the library will be at roughly 20 to 25 games. There are more than 120 games currently in development for the system around the world. In addition, due to the system's backward-compatibility with the Game Boy Advance via the DS' second cartridge port, the system will allow gamers to play more than 550 existing GBA games.