Gang aft agley,
An' lea'e us nought but grief an' pain,
For promis'd joy!"
So wrote Robert "Rabbie" Burns, The Bard of Ayrshire - presumably while drunk from the looks of it. Nevertheless, as incomprehensible as that "poem" may be, it serves as the perfect introduction to this: a list of the biggest unreleased games and consoles ever... many of which appear to have been conceived by drunks.