DynaMarisa 3D is a 3D third-person Touhou Project shooter fangame released by Twilight Frontier that parodies Sandlot's Earth Defense Force 2017. This game features stereoscopic 3D graphics, activated by through the Options menu, this allow for 3D graphics on computers using video cards that support for stereoscopic 3D graphics.

One day, Marisa Kirisame decides to break into the Scarlet Devil Mansion's library to "borrow" some of Patchouli Knowledge's books, as usual. However, this time she was caught off guard as she was surrounded an army of heavily-armed fairies and ant-like robots all under Patchouli's control.