Kami nomi zo Shiru Sekai, Saenai Heroine no Sodatekata Recommendations
While Saekano is a novel series and KamiNomi is a manga, both works are heavily involved with the concept of galgame, in some ways or other. In Saekano, MC and his friends formed a doujin group with the goal of making a legitimate visual novel that fans will enjoy. In KamiNomi, MC is tasked by a supernatural entity to capture the hearts of various girls just like in galgame. In both works, MCs are also avid gamers.