How do you get a rank code in Veronica?

I believe to get A rank the following must be done:

1. Save the guy in the beginning of the game by getting him the hemostatic medicine.
2. Use almost no health items.
3. Beat the game very fast.
4. Little to no save files.

thus, How do you get the rocket launcher in Code Veronica?

Infinite Rocket Launcher

Beat the game in 4 hours, 30 minutes. Beat the game without saving – the only save allowed is prompted before the disc swap. Never use a First Aid Spray.

notably, How do you get the linear launcher code in Veronica?

It is also an unlockable weapon in Code: Veronica, it is obtained after beating the Battle Game with A rank with all the characters. It can only be used in Battle Game however.

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