At the time I got them, the only R-type game I'd played was R-type Final, which I really didn't like.
So, one of the discs was R-type Delta. So I booted it up and watched the demo... then wondered why I hadn't taken notice of it before?
Then I started playing it...
I've got R-types as well, which I like but find quite stubbornly challenging. R-type delta felt like a lot more fun and graphics-wise looked like it would have been quite groundbreaking when it came out for the PS1.
So I've "discovered" a brilliant game I didn't even know I had, of if I did I hadn't seen fit to pay it any attention!
You discovered anything in your collections recently?

Ant