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Zanac is the greatest vertically-scrolling shooter ever to grace the NES, although it originated on the MSX... Oh well, it's still amazing.
The game contains a debug mode that allows you to skip levels, give yourself any weapon, or maximize your lives. The method of activating it is a real doozy: it requires the US cart, a Famicom, and a Family BASIC Keyboard!
- Power on the console.
- Soft reset the game 9 times.
- Type @COMPILE and press Return. You should hear the 1-up jingle play.
- Start the game as usual.
You should now have the full set of debugging features at your command. All of them are activated while the game is paused. The known functions are as follows:
- SELECT: Select weapon.
- CLR: 255 lives.
- INS: Warp to next area.
- DEL: Warp to previous area (if at Area 1, warps to Area 12).
Curiously, the Famicom Disk System version of the game contains the keyboard-reading routine, though it is not referenced anywhere else in the code. The rest of the debugging code seems to have been removed entirely.
NOTE: FCE Ultra and its derivatives have a bug which prevents this code from working properly. Please see the Notes page for more details.
Use Stage Modifier 0091000 to access Area 0. Area 0 uses Area 12's music, loops endlessly, and is devoid of the numbered weapon powerups. It appears to be either a memory filler stage or possibly a test stage. It seems like it could have been used to test enemy patterns, and in particular, the game's AI system and the effects on it caused by shooting or not shooting the Sart enemies (seen in the screenshot, to the left of the Zanac ship) that lower or raise the AI.
Area 0 became an unlockable bonus stage in the PlayStation remake on Zanac X Zanac.
As with The Guardian Legend, another game by Compile, hold A + B and hit Reset to access the game's Sound Test. This feature is in the US version only.
Alternatively, press Start + Select + A + B when "Game Over" appears.
Press Reset 13 times. Press Start to go in the main game menu. Press Left or Right to choose the level, then choose the "continue" option and press Start. To start at Area 11 or 12, hold Up on Controller 2 as well. Do the same if you want to continue the game after Area 10.
In the ending scene, press A + B on Controllers 1 and 2 to display "SEE YOU AGAIN IN GUARDIC". Guardic is another shooter by the same company for the MSX, released the same year as the original Zanac for the FDS. While Compile released a NES game named Guardic Gaiden (Known overseas as The Guardian Legend) two years later, it has no relation to this message whatsoever.
The US version also added a screen to select "GAME START" and "CONTINUE".
AREA 1 music is different tone.
The US version also added some music: