
When I was a kid, I was really fascinated by Xevious for some reason. It was HUGE in Japan, and one of the first games to use pre-rendered graphics on the sprites. I was always intrigued by the land you fly over. It looks like a golf course to me. When I was a kid, I got a sheet of my dad's dot matrix printer paper, spread it out, and drew a Xevious map on one side and a Zaxxon map on the other and used my toy spaceships to play pretend Xevious and Zaxxon on them. I got in a little bit of trouble for using up so much paper, though. :)
Gyruss and Time Pilot are awesome. Two of my favorite early Konami games. Gyruss was like a cross between Galaga and Tempest, and the creator of that game would go on to Capcom and make a game you might've heard of called Street Fighter 2.
Gain Ground is surprisingly good. It's like they took Ikari Warriors and made it a puzzle action single screen Bubble Bobble game.