An open-source video game, or simply an open-source game, is a video game whose source code is open-source. They are often freely distributable and sometimes cross-platform compatible.

An indie game, short for independent video game, is a video game created by individuals or smaller development teams without the financial and technical support of a large game publisher, in contrast to most "AAA" (triple-A) games. Because of their independence and freedom to develop, indie games often focus on innovation, experimental gameplay, and taking risks not usually afforded in AAA games. Indie games tend to be sold through digital distribution channels rather than at retail due to a lack of publisher support. The term is analogous to independent music or independent film in those respective mediums.