10 SECRET Console Features Discovered Years Later

Some video game consoles have hidden features, tricks, and even games inside of them that took years to discover. Here are our favorite examples.
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Sources and references:

Dreamcast fishing:    • Ridiculous & AMAZING Dreamcast Periph...  


PS1 memory card restore trick:
   • This PS1 Secret Feature remained hidd...  

Secret master system game: https://segaretro.org/Snail_Maze

Expansion pak: https://nintendo.fandom.com/wiki/Nint...

Dreamcast hack:    • Sega Dreamcast Fishing Controller Review  

3DS sound:    • Nintendo 3DS Sound Channel Demonstrat...  

Breakout:    • New Nintendo 3DS: Mario Theme Unlocks...  

Gamecube:    • Famicom Disk System and the Gamecube