Wow, you're quite a collector :)

Seems like just an extra copy with nothing special: https://steamdb.info/sub/235920/info/

Doesn't even include collector's edition stuff (i forgot though what comes in it, the info should be around somewhere).

Thank you and thanks for your response :)

On that pass it says AppIDOwnedRequired - Gods Will Be Watching (274290). Doesn't that mean that the original game is needed?

Yeah, i'm not 100% sure about this line, but as i understood seems like you're granted an extra copy as a Steam gift to gift to your friends because you've pre-purchased the game or something? At least i see you already have the game on your account. Though the game was released in 2014 it seems, while this package created around 2018.
Or maybe it means you're not allowed to obtain a Steam gift unless you already have the game yourself, to limit hoarding, so it's not a limitation on the gift item itself.

Steam gifts-as-items is now a very rare and outdated functionality, maybe you should ask in game collectors groups, they might know/remember more.

For example i found a gift package of Dungeon Defenders also having this flag: https://steamdb.info/sub/56733/info/
Also that game is one of rare examples of still existing 4-packs (buy for yourself + get 3 copies as a gift).