Fallout 4 is a post-apocalyptic role-playing game developed by Bethesda Game Studios and published by Bethesda Softworks. It is the fifth major installment in the Fallout series, and was released on Microsoft Windows, PlayStation 4, and Xbox One on November 10th, 2015, except in Japan, where it was released on December 17, 2015, possibly due to the need to censor some footage and references to atomic war, while still keeping the plot intact.
Mods and standalone-like projects created for this title were created using the Creation Kit, which becomes available through purchasing the game on Steam. There are various sources for mods, from the Bethesda Mod List and Steam Workshop, to the least-restrictive modding community Nexus Mods. At the Nexus, Fallout 4 has over 10,862 mods and projects available.