Hard difficulty:
Beat the game on Normal difficulty.

Insane difficulty:
Beat the game on Hard difficulty.

Stage EX:
Beat the game on Normal difficulty with Hotsuma.

Movies:
Collect 10 Oboro Coins.

Extra Options:
Collect 20 Oboro Coins.

Play as Moritsune:
Collect 30 Oboro Coins.

Play as Joe Musashi:
Collect 40 Oboro Coins. His sword does less damage than Hotsuma, but he has unlimited shurikens.

VR stage:
Collect 50 Oboro Coins.

Hard difficulty:
Beat the game on Normal difficulty.

Hard difficulty:
Beat the game on Normal difficulty.

Thanks to Revolution readers Psychotic Hybrid, rain, DARK FOCUS and Eddie Almbarak!