The Nintendo Entertainment System, or NES, is a home console designed to play proprietary ROM cartridges. The NES started the third generation of consoles and is credited with helping revive the home console market after the second generation ended abruptly in 1983. To reduce problems associated with low-quality games, NES games needed to be reviewed for quality and content in order to be published on the NES, although there are still several unlicensed games that bypassed the 10NES lockout system. The NES used a square gamepad with four face buttons and a D-pad. The NES-101 model, which featured top-loading and other improvements to improve durability of the console, was released on October 15, 1993 along with a rounded NES-039 gamepad.