Retrogaming, also known as classic gaming and old school gaming, is the playing or collecting of older personal computer, console, and arcade video games. Usually based upon systems that are obsolete or discontinued, these games are played either on the original hardware, on modern hardware via emulation, or on modern hardware via ports or compilations. Participants in the hobby are sometimes known as retrogamers in the United Kingdom, while the terms "classic gamers" or "old school gamers" are more prevalent in the United States. Similarly, the games are known as retrogames, classic games, or old school games. Retrogaming is often linked to indie gaming, which involves current games, though unconventionally published. Additionally, the term could apply to a newer game, but with features similar to those of older games, such as an "retro RPG" which features turn-based combat and an isometric camera perspective.