Tower
The Tower, also called the Great Tower and other similar names, is the central structure in the Simulation. Throughout The Talos Principle, the player (Athena) is warned by Elohim that ascending the Tower will lead to the player's death. In reality, ascension will lead to Elohim's death and to Athena's consciousness being transferred to the physical world.
The elevator in the Tower can take the player to floor 1 as soon as the Tower itself is accessible (that is, after leaving the Land of Ruins), but all other floors requires first using a terminal within the Tower. For floors 2 through 5, this requires using the terminal on the previous floor, which is accessible only after completing a puzzle. Floor 6 can be enabled from any Tower terminal but only after learning the required three-digit code (randomized for each playthrough of the game) from star worlds.
Star
A star is visible in a small building behind the Tower. It is locked behind a blue door that can only be opened by connecting a laser to a receiver.
If you can't find the blue emitter:
If you want to know exactly how to access the emitter:
If you don't know where to get connectors:
Floor 1
Puzzle
TODO
Documents
Floor 2
Puzzle
TODO
Documents
Floor 3
Puzzle
TODO
Documents
Star
A star is visible on this floor behind a wall.
A small hint:
To know where to begin:
The solution:
Floor 4
Puzzle
TODO
Documents
Floor 5
Puzzle
TODO
Floor 6
This floor contains only a tetromino arranger and a portal to the messenger ending.