A personal computer game, also known as computer game or PC game, is a electronic game (typically a video game) played on a personal computer (PC). Its defining characteristics include: more diverse and user-determined gaming hardware and software; and generally greater capacity in input, processing, video and audio output.

Home computer games became popular following the video game crash of 1983, leading to the era of the "bedroom coder". In the 1990s, PC games lost mass market traction to console games on the fifth generation such as the Sega Saturn, Nintendo 64 and PlayStation. They are enjoying a resurgence in popularity since the mid-2000s through digital distribution on online service providers. Personal computers are considered synonymous with IBM PC compatible systems; while mobile devices – smartphones and tablets, such as those running on Android or iOS platforms – are also PCs in the general sense as opposed to console or arcade machine. Microsoft Windows utilizing Direct3D has become the most popular operating system for PC games. Games utilizing 3D graphics generally require a form of graphics processing unit, and PC gaming has been a major influencing factor for the development and marketing of graphics cards.

The uncoordinated nature of the PC game market make precisely assessing its size difficult. PC remains the most important gaming platform with 60% of developers being most interested in developing a game for the platform and 66% of developers currently developing a game for PC. In 2018, the global PC games market was valued at about $27.7 billion. According to research data provided by Statista in 2020 there were an estimated 1.75 billion PC gamers worldwide, up from 1.5 billion PC gaming users in the previous year. Newzoo reports that the PC gaming sector is the third-largest category across all platforms as of 2016, with the console sector second-largest, and mobile gaming sector biggest. 2.2 billion video gamers generate US$101.1 billion in revenue, excluding hardware costs. "Digital game revenues will account for $94.4 billion or 87% of the global gaming market. The APAC region was estimated to generate $46.6 billion in 2016, or 47% of total global video game revenues (note, not only "PC" games). China alone accounts for half of APAC's revenues (at $24.4 billion), cementing its place as the largest video game market in the world, ahead of the US's anticipated market size of $23.5 billion.