Quartet/Hidden content
From Sega Retro
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Contents
Master System version
Level select
On the title screen, press PAUSE 12 times, then hold 
on Controller 2 and press 
on either controller.
Sound test
On the title screen, press PAUSE 4 times, then press on Controller 2.
All weapon upgrades
On the title screen, press PAUSE 14 times, then press on either controller.
References
| Quartet | |
|---|---|
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Main page | Comparisons | Maps | Hidden content | Magazine articles | Reception | Bootlegs
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