Lewd Multiverse

Built in Ren'Py, Lewd Multiverse by WaruiProgrammer is a visual novel that is ongoing. Expect fantasy, harem and parody with 2D art and animated scenes. The current build is 0.3.0.13.5 (264 MB). Available for Windows, Mac, Linux and Android.

From the box: “In Lewd Multiverse you follow the adventures of Takashi Kyoshi, a "normal" guy summoned by a goddess to save the world from terrible titans, or that's what she would like Takashi to believe!”