can you share your project? so i can try compare it or try compile mine https://yadi.sk/d/l_yn3IwBgRVs2, because maybe you miss “build” steap in VS while your custom function refer to any steam API function and that’s why you didn’t had building errors, as i told i have no problem with bringing up steam overlay after packaging, but my custom functions refering steam API functions won’t compile in VS, not in EDITOR 