I would suggest to merge the Unity tag into the the “Made with: Unity” entry. Right now both of them are defined as the same thing, so if they were any hypothetical games that were handling the concept of unity they would have been miscategorized anyway.
What’s more, right now there are 12,504 entries who have both tags. And while it’s commendable that some devs go through the effort of adding the tags in both places, a grand total of 55,621 entries (43,203 + 12,418) did not do that and have only one tag or the other.
Boring numbers aside, it would also be more transparent (thus less confusing) for the users and less redundant for the devs to use.
Same situation with the “Made with: Ren’Py” entry and the renpy tag, but with way less impressive numbers.
And with the “Made with: Unreal Engine” entry and the Unreal Engine tag.
And the “Made with: RPG Maker” entry and the rpgmaker tag…
There are more, but I hope I could bring my point across. (I don’t know how this tag redundancy came to be, but I could imagine that it was just a simple oversight when the system was upgraded to show game engines.)