I would like to recommend Phocas Island 2 a Doom mod. I know this isn't a game and i am not sure about what is allowed to be recommended, but i really wanted to share this. In my opinion this is the best doom mod/map and one of best games i have seen. It uses strifes level connection and has huge maps.
The plot is, you are stranded on island and you need to get off it, very simple. In game you can find notes that were left by someone. It's open world exploring with doom combat and puzzle elements. I remember someone describing it as point and click in doom. I really love the atmosphere in it. It uses custom textures and monsters, most of em ripped from different games.
I really hope that someone in future would make something similar. Sadly Phocas island 1 is different beast, more a classic doom level. If someone gonna decide to run it then i should warn that despite it recommending to use GZDooM, newest one wont gonna work. One level transition will gonna fuck up and insta-kill you, even in God mode. I am not sure which GZDooM version gonna work, but i played it with Zandronum 2.1.2 and i guess old ZDooM gonna work too.
Download link: https://www.doomworld.com/idgames/levels/doom2/Ports/p-r/phocas2
Small trailer: