Here you go chap:
At least that's how it used to be on Trade-It and then like back in the pre ebay days.
typo corrected for clarification
"As new" is still unused (so new and unused, but missing the shrink wrap) - so a Switch game that's been plugged into a Switch once is used - not "as new"
An Xbox game with fingerprints on the bottom isn't "as new", neither is a cartridge game with scratch marks on the metal contacts.
https://www.ebay.co.uk/pages/help/sell/contextual/condition_1.html
and
https://sellercentre.ebay.co.uk/business/item-condition
no mention that "new - other" or "as new" is allowable for a game that's being resold as it's been completed, but you know, it's still almost 90% pristine.
Yikes, got out of the wrong side of bed or something, or do you feel "stung" because you have purchased something
as new and it wasn't
New?
Look - the phrase "as new" has always* been used to describe a used item, that is in such great condition, you would be forgiven for thinking that it has only just come out of the box. Your example of the Switch game above would fit that requirement - irrespective of how many times it has been played, unless the owner is a minger, the game will be used but in nearly new condition - or A+ as eBay and Amazon like to call them.
You have to use your head though - though it seems that far too many people these days, are too stupid to actually read a listing, study photos, and take into considerations that the item that they are buying is £10-20 below retail cost - so (shock horror) might not actually be new!!
I have no idea what eBay's categories are, but here's a free handy guide for you:
New - brand spanking new, as you would buy it in a shop (cellophane/tags/etc)
As new - an item in great condition, though considered as used
Used - same as above, but maybe in a more worn condition?
* based on my ~40 years on this planet, and buying/selling a lot of things