>>719862238
I'm guessing the company chose the name "Delta" as an alternative for the word "Remake", since that term has a negative stigma behind it in marketing. It's the same reason why Capcom officially calls RE4R just "Resident Evil 4" for example. It's the same idea.

As to why they didn't keep the 3 ("Metal Gear Solid 3Δ"), which probably would have made a lot more sense for fans, my guess is that they wanted to bring in new players and not alienate them with a scary 3rd number entry. SH2 got the pass last year because it's a huge meme game that every zoomer already knows about thanks to Tiktok and essay videos on YouTube.