What were some of the games that you played that caused you to repeatedly launch your controller across the room, and likewise scream in terror because the game was just way too hard to beat. Using cheats or unlockables does not count. Using in game continues such as with Viewtiful Joe is O.K.
Any console or platform; sky is the limit here so long as it was an "unbeatable game"
Some of the ones I played and could not beat:
Battletoads NES
X-men Arcades Revenge SNES
Batman Returns SNES
Blaster Master (I could only beat this game using the bomb/repeated pause cheat to defeat certain boses)