R-Type

Stage 6
Stage 6 is hard, it requires intimate knowledge about the level layout and precision movement. This part of stage 6 is tricky - you need to get through the area with the vertical tunnels as early as possible, and then stay on the right until the Dop transporter exits the rightmost tunnel, and then move back into the tunnel yourself until all the Dops have passed. The part efter the checkpoint is even worse. If you lost your power-ups, you have to immediately stick to the first ceiling above you and fire like crazy on the row of Bydo dropping down on the right. If you stay there, the POW Armor will come to you. After that you have to navigate between the Dops and hug the wall above the little room in the middle. You can send your Force down and take out the POW Armor for you. After that, you have to squeeze between to Dops: And then you'll be ready for the final boss, which is just a lot of Dops coming down from the ceiling and moving around the level.

My current approach to them is to stay in the top area and move back and forth, avoiding the Dops without shooting.

An alternative strategy: I stuck my Force on the back of the ship and stayed on the right side of the leftmost area, using the Force to shoot left at the enemies before they turn back down. I do this until the final two, where the first is facing its vulnerable point left. I simply dodge those two, and the boss is over.

Stage 7
My current approach to stage 7 requires starting the stage with a force unit and a bit device. If you need to avoid the speed power-up, you should refrain from shooting before it passes overhead.

When you enter the inside of the decaying base, you should find an opportunity to swap the force to the back.

Then, wait for the leftmost explosion, and enter the small tunnel.

A bit later, a big orange thing slowly approaches from the left. Leave it be and swap the force to the front. Take care of as many enemies as possible in the 3 tunnels, before entering the middle tunnel in front of the orange thing.

Place your ship in the leftmost opening, destroying both waves of enemies coming down from above.

Stay at the left to finish off the last of the enemies.

When above the pit of launchers, move to the right to draw them to right...

... and then murder them.

Make sure to get the Bit Device, if you only have one.

Place yourself in the area marked green for the boss fight. This placement should avoid being hit by falling trash (as long as you have the Bit Devices). Move vertically to avoid shots from the Star Wars trash worms that fire bullets at you and concentrate fire on the boss.

Ships
Passwords
 * 1) 03     4170 4170
 * 2) 24     5050 1060
 * 3) 59     5959 5959
 * 4) 100    9910 0101

Stages
Recommended ships:
 * Stage 2.0: R-13T Echidna
 * Stage 5.0: R-9S Strike Bomber (has the Mega Wave Cannon, which is awesome against any boss)