Insomniac Museum

The Insomniac Museum is an easter egg in both Going Commando, Up Your Arsenal and A Crack in Time. There can be seen things that never made it into the game. In both instalments of the first trilogy, the Insomniac Museum can be accessed by being at a certain place between 3 and 4 AM (according to the Playstation internal clock), or by obtaining a 100% completion of the game. The Insomniac Museum appeared in A Crack in Time by pre-ordering the Discovery package or purchasing the collector's edition of the game. It could also be unlocked without pre-ordering through finding all 40 Zoni and beating the game's secret boss, Flint Vorselon. High Impact Games also offered the High Impact Games Treehouse, accessed through similar means.

Going Commando
In Ratchet & Clank: Going Commando, the museum can be accessed in the shortcuts menu after having acquired all of the weapons and upgrades along with all their mods.

A teleporter to the museum is hidden in a dry fountain in Silver City. When 3:00 hits, the teleporter can be used.

A third way to get to the museum in Going Commando is by going to Boldan, then gliding down the electric lines. Then, before jumping onto the construction site, by going to the left power line and jumping when hitting the barrier and gliding left to the ground. A sort of garage, or hangar, can then be seen ahead and to the left. Ratchet can walk alongside the garage, where he will fall into the ground - then he can walk under the garage and jump and enter the Museum and encounter three guards who will be shooting at him. Once they are killed, a teleporter appears behind them. There are at least 2 vehicles in it: the Bubble Sub and the Snivelak Car. And, on some versions of the game, there is a yellow hover convertable or Make your own Electrolyzer puzzle as well as an Infiltrator one. The roof of the museum was also accessible, although it wasn't an easy feat. You first had to locate the Gravity Boots walk way. As you went outside, (through hacking an Infiltrator puzzle) Ratchet had to jump over the railing and land on the other side. Whilst running across the ledge, Ratchet encountered a wall. Then he had to crouch jump around it, then hop over the railing again to land safely on the platform containing the Gravity Boots walk way. After that, you had to travel to top of it (the globe), then walk on the edge of the walk way and glide onto the roof. At the other end, a strange hammer-like object could be seen that had no use.

Ratchet & Clank: Up Your Arsenal
In Ratchet & Clank: Up Your Arsenal, the Insomniac Museum can be accessed via a teleporter on the Starship Phoenix after acquiring all of the trophies.

There is also a teleporter hidden in the first part of Metropolis. When 3:00am hits (make sure the PlayStation 2 time is right; you can change it in Settings on the PlayStation 2 menu), the teleporter can be used.

The Hound of doom weapon for R&C2 was one of the displayed items, as well as the original design for the Sandshark enemy.

Ratchet & Clank Future: A Crack in Tie
After unlocking, the Insomniac Moon could be entered by either flying to the Corvus sector and manually landing there, or selecting it on the Galactic Map above the Phylax sector.

The Insomniac Moon had a lobby, and two main parts. The part on the right of the lobby mainly focused on bringing cut-content to life, while the other had many concept art and information snippets.

Trivia

 * The employees at Insomniac Games called the latest one, the best museum in the series.
 * It referred to the moon symbol in Insomniac's logo.
 * The one in ACiT looked a lot like Clank's subconscience.
 * Dan Johnson can be found outside the building, staring into space, in A Crack in Time.

Appearances

 * Ratchet & Clank: Going Commando
 * Ratchet & Clank: Up Your Arsenal
 * Ratchet & Clank Future: A Crack in Time