Well, let's interrupt...
I don't get Ordinals full (I think)
But I can put all of the data of a floppy 1,44mb in a block?
However we can not open or use this data?
--snip--
It's definitely possible, but since transaction bigger than 400 KB (equal to 100 vKB or 400 000 weight unit) is considered non-standard you either have to,
1. Split it into few transactions.
2. Ask mining pool to include your transaction manually.
Although it's less practical since you need to write down which TXID contain your data and you need to figure how to run DOS game on modern computer or smartphone. And personally i'd suggest you to store or find copy of old game on community or organization which store retro game or all non-copyrighted content.