The High Impact Games Treehouse is a recurring secret level in Ratchet & Clank: Size Matters and Secret Agent Clank. This level contains things that did not make into the final game, including never used characters and weapons, concept art, Easter eggs, secret codes and more. Although in both the games the level has the same name and concept and is a secret level, the two differ from a different look and content. The purpose of the treehouse is similar of that of the Insomniac Museum in Ratchet & Clank: Going Commando, Ratchet & Clank: Up Your Arsenal and Ratchet & Clank Future: A Crack in Time.
Ratchet & Clank Size Matters
In Ratchet & Clank: Size Matters there are two ways to get to the High Impact Game Treehouse.
The first way is to go to the planet Metalis, once Ratchet has the Polarizer obtained from the Hoverboard race at the ruins of Medical Outpost Omega. Behind his ship there is a large circular door, that looked like a sewer door in a way, which can be opened by that gadget, revealing a bonus course. Completing this course will reward the player with a titanium bolt surrounded by crates. When the player changes the time settings on the player's PlayStation Portable or PlayStation 2 to around 2:42AM - 2:47AM, two teleporters appear: one leading back to the ship, and one leading to the treehouse.
The second way is to earn all the skill points, and then activate one of the cheats.
Ratchet's ship would land at a circular platform; in front of you will be a building, resembling a treehouse. Inside the whole treehouse, there were designer desks, lounging chairs and signs explaining things. Inside the Treehouse, there was the main room, which had a giant television screen which would let Ratchet play Clank Gadgebot Survival Challenges if the player clicked triangle. There was a non-finished weapon that was never put into the game, called the CUT, since it was cut from the game. The weapon's real name was going to be the Mini Turret Glove, and it was deleted for resembling the Bee Mine Glove too much. The player could also find an unused Ratchet Clone, and by pressing triangle it performed different animations. This Ratchet was ape-like and held a wrench, and was deleted because there were too many melee-type Ratchet clones. On the most top floor, there was a grind lock, which Ratchet could enter and complete, but when he completed it, nothing happened. Also, he could find a test module, which showed all its animations.
Secret Agent Clank
In Secret Agent Clank, the treehouse can only be unlocked on challenge mode. At the start of challenge mode, the player obtains the Therm-Optic Shades. With this item the player has to spot all alien codes scattered throughout the game. There are three in every Clank level, except for the final confrontation with Klunk. Once they are all obtained, the Treehouse appears last on the list in 'Special Missions'.
Upon entering, the player would see a giant Treehouse in front of you. In the whole Treehouse they would find Designer messages, Designer desks, gift boxes to play the game Robot Finds Kitten, and concept art. In the first room (the one in front of Clank after landing), the player would find a Guard Dog that shot "death missiles" that could not harm Clank and that was unable to be attacked, some picnic tables, a carpet with a rope hanging on top from it attached to the ceiling, cubicles, and a television screen Qwark's Opera could be heard with, but this time if the player turned on subtitles, it would tell you the words and verses cut from the game. On the other side of the TV, there was a picture of Ratchet in his prison clothes, and a secret code for Ratchet & Clank Future: Tools of Destruction.
In the room to the right there were more playable Ratchet challenges and a table tennis table. In the room from the left of the first room, the player could find still versions of some villains of the series, which were the Jack of All Trades, the Kingpin and Klunk, the bosses of the game, Nefarious (robot clone) and Robo-Ratchet (a robot clone of Ratchet) to be scanned with Clank's Holo-Monocle. There was also a group of game designers that tried to sing Qwark's Opera and Bolt Boss, a enemy character that was cut from the game. In the last room the Dallas Chalise could be found. To activate it, the player could enter the following code: up, up, down, down, left, right, left, right, O - which is the main sequence in the "Konami Code." It restored Ratchet's nanotech, but was possibly used once in a level. The last room was behind the point where Clank landed and was guarded by a door that only opened if he had all three keycards.
A bonus minigame could be played inside the Treehouse, called Robot finds Kitten. Scattered around the treehouse were present boxes. Clank had to try to open the one with kitten in it. To open it, all he had to do was hit it. There was no reward for this mini-game, and if he won, the only thing he would receive in return was a message if the player wanted to play again.
Ratchet & Clank: Size Matters
- On one of the desks there was a picture of the High Impact Games staff.
- On one of the desks there was a ton of cereal boxes stacked on top of each other.
- Strangely, The High Impact Games Treehouse looks completely identical to Pokitaru. This Treehouse could actually be located on Pokitaru since when traveling to the planet, the name of the planet is never mentioned. It could also be because this was a bonus level and the designers did not want to waste time on making an extra planet skin.
- If Ratchet jumped on top of one of the signs he would respawn to the beginning of the level. The reason why this happened was because when Ratchet jumps on top of the sign, it started his falling animation, then the game thinks he was falling of the Treehouse, so that it made him shout his Death Shout, and then he respawned. If he jumped on the sign, the player could watch his falling animation, and if he got off quickly enough, he would not die.
- At one of the rooms that was outside, there was a giant bulldozer that was from a demo.
- If you used the Sprout-O-Matic here, the game will freeze.
- Two of the Battle Ratchets that got cut from the game are available to see.
Secret Agent Clank
- On one of the desks there was a picture of a woman and if the following buttons were pressed, a memorial for the mother of a game designer appeared: Circle, Circle, Triangle, Circle, X.
- After getting the Dallas Chalise, it can be used any time by entering the following code. It restores Maximum Nano-tech: Up, Up, Down, Down, left, right, left, right. This is the same as the famous Konami code (first used in the NES version of Gradius though more famous in the NES version of Contra), which is possibly a reference.
- In the Treehouse, it revealed that the Walloper and the "Lightning Gun" (Thunderstorm Umbrella) was inspired by the developers desk lamps.
- If the player went to the main room or first room, and turned right, they would be on a rope bridge. If they crossed the bridge halfway and look into the sky, above the treehouse, Clank's ship would just float there in the sky motionlessly. Why the ship was there is unknown.
- The Carpet, with the rope hanging from the ceiling above it has captured the attention of some fans. Many think that there was a way to pull it and if that was done, it would reveal a secret. This may be fan speculation.