It's actually an invisible shield. It's near the top of the screen just before the quick battle with the flying robot. Best chance of hitting it to reveal it is by using Snake.Vincent Draconis wrote:This is actually the first I've ever known about a Shield in Ruins. I usually never bother to stray from the middle of the screen for the entire stage, which might explain why I never saw it before (I'm assuming it's stashed at the top/bottom of the screen somewhere).
There's also four or five items at the very top of the screen just before the boss on Stage 8/Wall. They are hidden in a walled off section at the very top of the screen but... if one has shield left (or is willing to lose a ship), go in there through the wall, start shooting immediately, and there's two or three weapons, a shield, and a 1up hiding in there to be collected (so if a ship was lost it's been given back by collecting the 1up). Note that getting out of there will cost one hit on the shield so there will only be two hits on the shield left for the actual boss fight.