whats da third? die?
The third is a secret path behind the first spike wall.
Final part: NO! I WANNA BE THE GUY!
You're on a bridge filled with the dead bodies of failures that died challenging The Guy. This area is nameless. If you've collected 5 secret items, the sixth is at the other side of the bridge after a course. After you get it, go back to the bridge and give in to the flipping blocks here:
flippingblocks

THE INCINERATOR OF THE GUY
Uh oh. Hope you didn't use your double-jump back on the bridge, you need it here. Double-jump onto the platform. It falls. Jump on the other 2 falling platforms and jump on the moving platform. It will carry you to...
THE FINAL TOWER OF THE GUY
Oh yay. I've heard that this part is SUPER ANNOYING. Actually, it's pretty easy if you keep ahead of the platform. At the end, jump down the platforms and onto a safe spot. Walk along and jump into a tunnel. This is it...the final battle. Shoot the save before challenging The Guy. Learn to expect the CUCUMBER!!! See? You didn't. Achem...learn expect the unexpected in IWBTG, because the save apparently doesn't like bullets. When you shoot it, it tries to eat you. Shoot it again 5 times to turn it into a real save. Shoot that.
BOSS BATTLE: THE GUY
After an epic cut scene where you find out that
The Guy is really the Kid's father
, you will begin to FIGHT!!! Time for fightyness! I'll tell you The Guy's attack pattern for each phase. Shoot him!
Phase 1
1. Fire bullet
2. Jump to other side and throw grenade
3. Jump down, wait a bit, then fire more bullets if the Kid's too close
4. Ram walls and start over
Phase 2
1. Fire two walls of giant bullets
2. Jump to other side and fire 5 giant bullets
3. Jump to other side and start over
Phase 3
NOTE: The Guy is invincible during this phase. He can only be hurt be his rebounding bullets.
1. Jump to center of room
2. Fire 5 rebounding bullets
3. Throw grenade and wait a bit
4. Start over from 2.
Yay! You win! Grab The Guy's gun and...
AGGGGH GIANT GUY!!! WHAT HAS HE BEEN EATING!?!?
Phase 4
To beat him this time, you have to shoot out each eye. Try to shoot them out quickly, because when an eye is active it will fire a fireball every so often. How can one fire a fireball from one's eye? He'll also sometimes get a mouthful of spikes then throw them at you. After you shoot out each eye, he'll do a special fireball rapid-fire circling attack.
Phase 5
Now he'll light part of the floor on fire. He now can fire white homing shootable fireballs that can be spawned no matter if the eye is shot out. Also, instead of the spike attack, he'll sometimes breathe fire at you.
Phase 6
Now The Guy will light the entire floor on fire. His attack patterns will be the same, however. Once you shoot out the eyes, The Guy will die.
THE END
FINALLY!!! YOU HAVE BECOME...THE GUYYYYYYYYYYYYYYYY!!!!!!!!!!!!!!!!!!!!!! Yes! I haven't really gotten this far, but I saw the final phase and ending on Youtube. Enjoy the ending.
Psst! Hey you! PSSSSST!!! You wanna know a secret? You can skip The Guy with this cheat:
Press E-N-D on the keyboard during the battle.