Steam thinks game is Uninstalled when it Isn't

Support
1

Steam reports the game as Uninstalled (or, NOT installed)

But the game has never been touched since I last closed the game a few hours ago:

I don’t even know how this happened. Any insight to why this would happen suddenly? Is there any way to recover?

2

did you try verifying game files?

3

That option is greyed out.

It won’t let me do it.

4

try following this, it seems like this happens pretty frequently: https://support.steampowered.com/kb_article.php?ref=8379-RYIP-2998

5

It won’t let me try reinstalling the game because there’s not enough space, and I can’t make Steam recognize the game by adding a folder because I can’t add to the same one and the default folder cannot be removed. I’m going to try moving the game somewhere else on the disk and name it like a steam folder would.

Edit: It won’t let me. I cannot make Steam recognize the game with what you sent me.

6

I’m just going to reinstall the game, like it says in the guide there. Thanks for the help, though!