It should also be complex, using as many different character types as possible.

FORBES: Creating And Using Strong Passwords

An expansion pack is sorely needed at this point, however, and preferably one with a couple new playable character types and a bunch of new areas.

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As far as character selection goes, the more character types you include, the more complex your password can be, and the harder it will be to crack.

FORBES: Creating And Using Strong Passwords

Removing all character-specific areas is an option, and only including areas that give boosts to certain character-types, but even this could risk upsetting the balance.

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An optical-character-recognition machine for the blind that's capable of reading most types of printed text aloud, the CCD flatbed scanner, speech-recognition software, the first synthesizer that created sounds virtually indistinguishable from those produced by their acoustic counterparts, and a whole bunch of other nifty things we can barely comprehend came from Ray's brain.

CNN: STORY HIGHLIGHTS