The Dome is located in the southern portion of the Northeastern continent of the World Map. The Factory is located to the north.
Crono and his party leave Lab 32 and soon reach Proto Dome, but find the inner chambers locked. Lucca also repairs a deactivated robot they find in the Dome. When switched on, the robot says his serial number is R66-Y, but Crono renames him Robo. Thankful for the repairs, Robo agrees to head into the Factory up north to turn on the power so they can open the door to the inner chamber to get to the Time Gate. But one of them has to stay behind to open the door because the power won't stay on for long. So Crono chooses whether Marle or Lucca stays, and the party of three heads north to the Factory.
After the battle with the R Series robots in the Factory, the destroyed Robo is brought back to Proto Dome where Lucca repairs him once again.
Knowing that Robo no longer has a life in 2300 A.D., he agrees to join Crono and his friends on their journey through time. So together, the four of them enter the now unlocked door and into the Time Gate.
On a mission to open the sealed doors in 2300 A.D. after having been locked out of the Time Gate leading to 12,000 B.C., Crono's party returns to Proto Dome and heads across the continent.
There are only two rooms in Proto Dome, one of which contains the Time Gate. An Enertron is also in the first room.
People and Enemies
The following is a list of important characters and enemies the player will encounter.