Some of these games are pretty hefty on the GB's. I suggest backing up your game before doing this but I have not noticed any problems at all.

Basically go to your steam apps common folder, navigate to the dread x collection folder. Go to the folder titled games. And simply delete the games you don't want, finished or won't work properly and delete them. You can also check the size of each game by right clicking and viewing properties on the specific folder.

Outsiders was a massive 6 gbs, rotgut which is a very short game was over 2 gbs. So of course if you don't want these games you can free up some space.

The game launcher will still load as usual and you can play whichever game is still in this folder.
Good to know if you want to keep smaller games, or your preferred ones.

Just letting you know in case you're worried it will mess up the whole game. Luckily it doesn't and I've reset steam multiple times and no issues. I suggest not trying to press on the ones you uninstalled in the launcher I have not and don't know what will happen (probably won't even work).