Simon the Sorcerer

Real-time:
*) defeating the mummy -- easy, repeatable
*) getting the beer -- lots of time, repeatable

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Reasonability:
*) putting out the woodcutter's fire -- not clear why you would want to, other
   than you have a fire extinguisher
*) defeating snowman with mints -- silly, but the game gives a hint

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Difficulty:
*) getting the barrel of beer -- very devious
*) getting oil for the tap -- knowledge required!
*) getting the dwarf beard -- it's obvious, once you see it
*) turning the druid into a frog -- a little silly, but okay in this kind of
   game
*) cracking open the fossil -- good "eureka!" problem