Shin Megami Tensei - Devil Summoner - Platform: Playstation 2

Hard Difficulty:
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Beat the game once to unlock Super Zunoha Raidou mode, which is hard difficulty.

Training Hall floors:
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Successfully complete the indicated episode to unlock the corresponding floor 
in the Training Hall. To use the Training Hall, use the washbasin in Nameless 
Shrine.

Episode  2: Floor 1
Episode  2: Floor 2
Episode  3: Floor 3
Episode  4: Floor 4
Episode  5: Floor 5
Episode  7: Floor 6
Episode  9: Floor 8
Episode 10: Floor 9
Episode 12: Bottom floor

Unlockables:
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Complete the Game and create a clear game save file to unlock the 
following new game plus features. Your character's level will return to 
Level 1.

Loyalty carries over:
New game plus reward.

Hard Mode Available:
Optional New game plus feature.

Title carries over:
New game plus reward.

Infinite normal ammunition:
A special gun clip will be added to your inventory.

Shop Rank carries over:
New game plus reward.

Confinement tanks carry over:
New game plus reward.

A new side quest becomes available:
Collect uniform pieces durring the course of a new game plus for a character.