It was superseded by the Director’s Cut edition. So you can buy DS but not the original launch edition

That’s actually a case with a lot of games on the list that got a remake, director’s cut, upgraded edition etc.

This site has a tag for games that get relisted, but it really needs one for games that got remastered as well. It's a bit misleading to say a game is gone when you can still buy the GOTY version.

Really, it would be nice if every listing had a 1 or 2 word tag that summarized the reason for the de-listing.

Publisher Closed

Servers Shut Down

Remastered

License Expired

TOS Violation

That sort of thing.

It's only misleading to say so if the edition that replaces it is not strictly worse in at least one axis: Botched remasters, full remakes, unrenewed licenses, ports from a worse version of the game instead of the original...

Now, if there's actually a better release of the same game, then sure it should be at least tagged clearly.

>I was unable to know what games were those

You can check by copying the url of the blank game and pasting it into SteamDB's search field.