Assault Suit Leynos 2

Assault Suit Leynos 2
Developer: NCS Publisher: Masaya Platform: Sega Saturn Released in JP: 1997 This game has debugging material.

Debug Mode

Each code is standalone, but the first code must be entered first for the others to work.

Enable the Mech Select screen right from the start
At the title screen, hold L+X+Z+Right and press C on Controller 2. A sound will be heard if it was entered correctly.

Invincibility
At the title screen, hold L+R and press Start on Controller 1.

Unlock all mechs and powerups
On the Data Select screen, hold L+A+B+C on Controller 2 and press Start on Controller 1 (your save data must be empty for this one to work).

Mission Select
On the Mech Select screen, highlight a number (from 1-7), then hold L+R and press Start on Controller 1. You'll hear a sound to signal that the code worked. Now, pick your mech and start the game to begin on the mission that corresponds to the number you selected.

(Source: Rings of Saturn (debug codes), ReyVGM (Stage Select))