gamehuntera
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And as for what HL1 is, I have no idea :)
Half Life 1. The game that Counter-Strike came from ; )
As for AD&D, you'd have to be a real genius to accidentally avoid repeating what was already in it.
Uh-huh. Most of everything that could be thought of has already been invented before us. But one can come up with even more intricate things; however, one shouldn't get carried away with inventing for the sake of original invention alone, because it also needs to be interesting. My apologies for the demagoguery :)
In general, a concept doesn't necessarily have to be original; it has to be interesting. Such is the nature of Creation.