This Top Video Game Companies ranking is based on analysis of annual and quarterly financial reports published by a number of relevant publicly listed game companies. For companies that do not split out their game revenues, the analysis includes estimates, which may or may not be indicated explicitly. Revenues (GAAP) are restated to reflect Calendar Years, therefore do not necessarily match reported Fiscal Year results of individual companies. Revenues exclude hardware sales and other non-game sales to the extent publicly available. Microsoft, Sony, and Nintendo estimates represent all Xbox, Playstation, and Nintendo non-hardware platform revenues (including Xbox Live, PSN, and Nintendo eShop revenues respectively).
Source: N4G PC Top Public Video Game Companies | By Revenue