The graphics and memory capacity of 6th generation consoles such as the Xbox, PS2, and GameCube were comparable to those of the PSP. It was also capable of running ports that were the same as those of the original PS2 versions. The PSP's introduction was a massive success, despite the prevalent view that it was a very costly handheld device in comparison to previous ones. According to some people, the PSP was a failure after Nintendo DS nearly doubled its sales despite it having excellent hardware. It had a plethora of game genres and was one of the most successful handheld devices and video games ever made. It is thought that PSP had one of the strongest RPGs and a broad range of game genres. ROMs preserve game data and keep the origin program functioning on all consoles. They preserve the user modifications and deletions.