Here are a couple of ideas:
- FPS that autosaves at low ammo and/or health. Have fun dying!
- A game suddenly has a mission that requires the player to not touch the keyboard or mouse for a number of hours, without notifying them that the mission started. Losing the mission means losing the game. Have fun breaking the computer!
- Any game where a loss results in force corruption of the game files. Have fun reinstalling!
- An RPG where random battles are designed to spawn enemies that are either resistant to every type of damage your party can deliver or is randomly immune to a single or multiple party members. Have fun attacking that tank with your theif!
More later.
Edit:
Quote: "Just got an idea for a rythm type game... think Stepmania, except that you have to use the entire keyboard AND the mouse too!!!"
Actually this doesn't seem that far fetched. The player would have to click on different text fields, type a given word (In time to the music of course), hit enter to the beat, and move on to the next field.