Xrott

I've been doing the same thing for a while now too and I really think you're underestimating how many items are on that list. Even if you only spend around 30 seconds on average per item, it'll take you about 14.5 hours to get through them all. Also a fair warning: a lot of them are not video games. There are many that are PDFs of table-top RPG rules, short stories, comics, art asset or sound effect packs for game creators and soundtracks.

Just guessing, but it sounds like a bad/loose connection between some cables. Maybe some dust gathered inside your ports or there has been some corrosion on the pins? To test that you could wiggle your cables around at the connectors and whenever it's at a spot where it's working right, try holding them in place and see if the problem stops.

Glad I could help!

This looks suspiciously like anti-aliasing. Either the image is offset by like 0.5 pixels or there is a edge-smoothing function enabled. Try adding a offset of 0.5 yourself and see if that fixes it. EDIT: actually it looks like it's only offset on the y-axis