Heli Attack 3/Secrets

Cheat codes
These are entered by going to the main menu, then selecting Players, and then Cheats.

To unlock weapons
 * John Rambo : Unlocks Bow & Arrow
 * Old Faithful : Unlocks Chain Gun
 * Its a Jackal : Unlocks Sniper Rifle
 * This is my boomstick : Unlocks Double Shotgun
 * Shrapnel : Unlocks Flak Cannon
 * Follow the leader : Unlocks Guided Launcher
 * Moonshine : Unlocks Drunken Launcher
 * Gloop : Unlocks GooGun
 * 9 Volt : Unlocks Spark Plug
 * Australians all let us rejoice : Unlocks Bladerang
 * Alpha : Unlocks Laser Rifle
 * Beta : Unlocks Auto Laser Rifle
 * Gamma : Unlocks Laser Shotgun
 * I don't have time to bleed : Unlocks Anytime
 * Call in artillery : Unlocks Airstrike
 * Missile launch detected : Unlocks A-Bomb Launcher
 * Bass in your face : Unlocks Soundwaave
 * Wash away the rain : Unlocks Black Hole Generator
 * Up up down down left right left right b a select start: Unlocks all weapons

Collectors Edition Cheats
 * Firelines : Unlocks Fire Mines
 * Pure Pwnage : Unlocks Anti Matter Cannon

To unlock levels
 * Ive got jungle fever, she's got jungle fever: Unlocks Amazon Jungle
 * Aint no mountain high enough: Unlocks Canyon Lands
 * Who rides the wrecking ball: Unlocks Underground Lab
 * You are the moon master: Unlocks all levels

Miscellaneous
 * iopred: Unlocks Programmer Message
 * DayDream: Unlocks Programmer Message
 * Training 1-1 1-2 1-3 1-4 2-1 2-2 2-3 2-4 3-1 3-2 3-3 3-4 4-1 4-2 4-3 X

Secrets

 * If the player shoots any enemy while in the air by using Hyperjump, he/she gets 25 machine gun bullets.
 * In Zone 2-2, go to the place where there is a branch. Soon you will fall down the branch. Shoot at the branch. The branch will break. You can use this place as a hiding spot.
 * In order to find hidden weapons, hold Modify and Crouch in certain places . There are 3 hidden weapons : in 1-3, in 2-2 and in 3-3 . They're under the earth, you must go down by holding Modify and Crouch at the same time.
 * In the training mission, there is a flak cannon on a high platform above where the four dummies are. To get on the platform, you must slow time while hyperjumping on the platform.  Using regular-time will be extremely hard because you have to crouch to get on.
 * There is also a chain gun in the training mission. This is obtained by dropping down at the first straight wall and shooting any weapon directly at it. This will reveal a path leading to the chain gun.