So far, I only know about these bonuses, I'm wondering if there's more.
Level 1
The Car:There's a red (Or blue if you're 2P) car that speeds across the overpass and swerves to dodge a tank. Destroying it gives you a 10000 point bonus. If you're playing Dual or Double, both red and blue cars will drive by. This means dual/double players might have a chance at a slightly better score on this stage.
The Fairy:After the city is shelled and the large building is destroyed, a small blue crystal is visible. Destroy it for a Fairy.
Level 3
1UP:Destroying the four cranes on the left and right of the screen right before the boss reveals a 1UP.
Level 6
1UP:There's a tower near the end with several "rings." Each has several guns on it. Destroy all three rings, and the last will drop a 1UP.
RQ: Raiden III Secret Pickups/Bonuses
RQ: Raiden III Secret Pickups/Bonuses
YOU ARE APPROACHING THE TARGET OF ATTACK! THE MISSION STARTS NOW! ARE YOU READY?!
Re: RQ: Raiden III Secret Pickups/Bonuses
There's a fairy among the asteroids on the right hand side at the start of level 4 but it's practically impossible to miss that one if you have the wide shot!!!!