The first I played at an arcade in the mid-90s. Here's what I can recall:
-Vertical shooter, most likely futuristic in style
-multiple ships to choose from, possibly with pilot portraits ala Batsugun
-used a shot/laser system similar to DDP, but the laser mode was activated by mashing the shot button instead of holding it. Fully powered up, the laser would easily fill 1/3 of the screen or more (if memory serves, the most insane weapon I've seen in a shmup)
The second I played earlier, perhaps late-80s
-horizontal shooter very similar to Gradius, except with a robot (or guy in a jetpack?)
-weapon system was also gradius-like, except you could combine different upgrades to make unique weapons
thanks in advance for any information you can glean from my childhood half-recollections
