I just want to be able to scare the shit out of police by leaving messages and riddles on the wall, and tapings of the victim's last few hours.
That'd be fun.
Of course, I'd cheat by playing a really smart guy to prevent any damning evidence being found...
Or what if I wanted my temporary hideout to be found, and the cops'll find a little... pyrotechnic present waiting for 'em?
That'd be cool.
Didn't Death Note do stuff like that already?
Death Note was more about psychological manipulation, no actual traps were set. Social engineering rather than actual literal engineering
There WAS actually a trap like that, but it was never set off. It was an intricate trap, that if someone attempted to use the wrong key in a certain shelf that was holding the Death Note, the murder 'weapon' in the series, would be set on fire, destroying the evidence. An amusing thing to note though, is that it wouldn't have worked for destroying the evidence as the book couldn't be destroyed that way, at least from what I remember of the rules.
There were a lot of unnecessary info like that in Death Note, making it confusing at times. It really only became popular because it was easier to relate to by this generation. There has been at least one other series I can name that takes the same concept of a person attaining a super power and trying to change his environment on a large scale by killing people with that power, and that one was older than Death Note.
On that note, a Mod for a genuine Death Note for this game within the next decade or two would be marvelous.
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Response to Itnetlolor:
Now imagine, with the features added in a later date, being like Runge or Tenma, chasing after the culprit. Imagine being Runge, and what he thought about the relationship between Tenma and Johan.
Do you remember that one scene where:
Both Tenma and Runge acted out Johan's murder scene in a perfect mirror image, trying to determine what exactly happened in that home? Imagine being Johan, doing that scene, and stopping at that perfect moment, where both Tenma and Runge wondered just WHY Johan did not kill the man right then and there, you look right into the mirror while attempting to murder someone and freeze, psychological effects tearing at you in your head.
EDIT:
Another extra note, how about that Magnificent Steiner from Monster? That'd be a neat feature.