Unlock 'Maniac' Options
When you reach certain levels or complete tasks in the original game the 'Maniac' options for that game will become available.
Pac-Man - Unlock High Score Attack:
Reach Round 3 (view the first cutscene)
Xevious - Set Special Flag Function:
Find a hidden flag along the river.
We have more cheats and tips for this game here, Namco Museum Battle Collection cheats
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