OK, that game seems way familiar. I have no idea what it's called though. Maybe when hyiu gets home, he'll be able to remember.
It's not Raiden, it's just a vertical shooter (all vertical shooters are 'like' Raiden, because Raiden is a vertical shooter) However in Raiden II, if you have the blue beam and get behind the other player, the beam splits into a 'V' when it hits the other player. I don't think it's Blasteriods either, that's just a souped-up Asteriods.
Gah, I think this came out for a console too.