 If you liked
Phi Brain: Kami no Puzzle
|
 ...then you might like
Sword Art Online
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this is similar and different in a way.
Phi brain plays the game like SAO, but are not really IN the game as SAO.
the situation is kinda different here, and that is that phi brain can avoid it, but SAO, you are in it and could not avoid it even if you want to.
both involves risking their own life to finished the game.