Levels from hell

thumb|300px|right|Good luck with this level999 B.F.B's appear on Round 250, the "unofficial" last round of BTD4. It is possible to finish the round if you can somehow manage to place Sun Gods all over the screen. No rounds are programmed after this one; you can start round 251, but no Bloons appear, so you must end the game to exit it. 
Stage 3: Turbo Tunnel - This is the first level where the players ride a vehicle, in this case the Speeder Bikes, and must navigate a dangerous obstacle course at high speed. This is considered the first truly challenging area of the battletoads, and it only gets harder from here.
The Water Temple (水の神殿, Mizu no Shinden?) is the sixth dungeon in The Legend of Zelda: Ocarina of Time. The temple is where the Zora pay homage to the water spirits. The Water Temple is infamous among Zelda fans for its difficulty; however, the dungeon's difficulty level was drastically lowered for Master Quest.
Filmnstuff Made a video series of the same name(infact, his came 1st)
You have a weapon this time, a candle, which you will find all over the mansion. The mansion itself isn't so tricky, it's the things in the mansion that make it hard. Try to kill anything that moves, except chairs, which you ride up levels and chandeliers which you can use to cross areas. When you get to the library don't fall off, or you will die! No walkthrough this time as there are no different paths that you can take, just be careful!
The Engine Room is a huge, cavernous area inside The Rusty Bucket of Rusty Bucket Bay. With its cams, cranks, wafer-thin platforms, and deadly fans, it is possibly the most hated room in the entire Banjo-Kazooie series.
ikaruga is possibly the ultimate example of a difficult game.
This is it, the end-all be-all of battles. No more playing around, everything up to this point was just the pre-test, this is the final exams.
Pac-Man has a famous kill screen often referred to as the Pac-Man Bomb Screen. The game's level counter was a single 8-bit byte and could therefore store only 256 distinct values (0–255). Reaching the 256th level causes the counter that is used while drawing the fruit to overflow to zero, causing 256 fruits and seven blank spaces to be drawn. It can, however, be fixed with a patch.
Corpse of the Behemoth is the 7th level in The Demon Realm. This is a grueling level with very little room for error. According to Judgespear, this is one of the most aggravating levels in Mushroom Kingdom Fusion.
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