Video game Easter eggs are fun extras for the fans and are usually even easier to find than the real thing--they might demand 10,000 coins, but you never need to stand up. But some of these little secrets, cheats or glitches are so well-hidden they stay out of sight for years, even with millions of gamers exploring every nook and cranny of the game world. For instance...
9Sarcastic Announcer (Wave Race Blue Storm, GameCube)
Right off the bat here's one that took nine years to find.
The jet ski racing game Wave Race: Blue Storm for the Nintendo Gamecube already had a secret password entry screen (accessed by pressing START+Z+X on the options menu) unlocking everything from dolphin riding to secret time attack competitions. The secret that no one managed to unlock, however, is the alternate voice track where the race announcer is replaced by a droll, bored dude who sarcastically derides your every move. Yes, this is real:
The cheat was based on messing around in the audio options and, sadly, the only three people who play with the audio options screen are the guy who programmed it, the guy testing it, and the guy who doesn't exist.
By entering a higher Scrabble score version of the Konami Code (L R L R UU DD AZX) after holding Z to change the sound displays waveform into a vertical rising fog, which isn't technobabble crossed with bad poetry but an actual description, you unlock the sarcastic announcer taking the piss out of you. This was presumably a placeholder track laid down before they could get the final one, but compared to the normal Captain Obvious Wave Race announcer ("YOU'RE IN FIRST PLACE") it's actually a huge improvement.