Open source video games have also proved modestly popular on the Mac. Although, due to the free software nature of the system, development of free software titles mostly begins on Linux; afterwards, major games are typically ported to Mac and Microsoft Windows. Mac has less mainstream games than Windows and as a result, free games have had more of an impact on the platform. Notable free games popular on the Mac include The Battle for Wesnoth, OpenArena, BZFlag, LinCity, and more.