Probably the best old shmup you'll ever see.
Rayforce was an STG that was way ahead of its time when it was first released. The scoring system is so versatile and complex that it's hard to believe that this was a game released in 1994. A lot of really old shmups are extremely basic but Rayforce has more in common with newer shmups like Ketsui with it's complex scoring system that requires quite a bit of experimentation to find the best way to score in.
Enemies in this game exist in either the foreground or the background. You can lock onto enemies in the background with your homing lasers by hovering over them with your reticle.
You can lock onto a maximum of 8 enemies at max laser level and every next lock gives you a bigger score multiplier for the enemy score value. The multiplier is as follows: 1x, 2x, 4x, 8x, 16x, 32x, 64x, 128x. As you can tell you want to destroy as many enemies with a level 7 and 8 lock as you can, favorably on enemies that have a high base-value. However not all enemies give a score multiplier when killed, only the ones that have numbers pop out of them do.
Once at max shot or max laser level every powerup you pick up slowly increases in value like medals in Garegga up to a max of 10k, which is quite a significant amount. It's okay to let one drop but when you die the value resets.