Tetra Star: The Fighter

Tetra Star: The Fighter
Developer: Home Data Publishers: Disco, Taito Platform: NES Released in JP: May 24, 1991 This game has a hidden sound test. This game has a hidden level select.

Tetra Star: The Fighter is a spiritual sequel to Cosmic Epsilon.

Debug Menu

Tetrastar has a multi-tier debug menu/sound test where you keep having to unlock new options by fiddling with the settings on the options you already have.

At the title screen hold A + B and press Start to enter the menu. To start with, only a sound and music test appears.

Press Down with the sound test still on "00" to reveal Sampling, which plays the digitized samples in the game.

Next, set Sound to "65" and Sampling to "02", then scroll down again to reveal "Rest", which edits your extra lives (up to 9).

Set Sound to "68", Sampling to "0B", and Rest to "09" and scroll down to reveal "Phoenix", which is an invincibility toggle.

Finally, go to the "Phoenix" option, then press and hold Right until the option stops switching between On and Off. Then, press Left twice. Finally, hold Select and press Down to enable the "Stage" and "Visual" options, which allows you to select a stage to start on or watch cutscenes, respectively.