- "That glow, that enchantment is the work of a very old group of builders. A group so old that they existed before the Order of the Stone!"
- —Ivor talking to Jesse about the Enchanted Flint and Steel and The Old Builders. src
The Old Builders are a group of very old and experienced architects who created exquisite buildings over several worlds and hid treasures in them, such as the Enchanted Flint and Steel. They also created The Games.
- Hadrian (Leader)
- Mevia (Enforcer)
- Otto (Officiator)
- Harper (Engineer)
- Cassie Rose (assumed) (formerly)
The Old Builders were mythical and experienced builders who were known to create many majestic creations including their Temple in the Overworld. They also created the Portal Network, which they used to link the Overworld to many other worlds. These portals could be activated through Enchanted Flint and Steels, which were hidden in each of these worlds.
The Games were made by The Old Builders, where people can compete against each other. At first it used to be voluntarily. However, when Hadrian took charge, he forced the competitors to stay and forced them to work in the mines forever if they lost. The only way to be freed from imprisonment was for the competitors to win the games, though Hadrian along with Mevia had prevented anyone from winning up until Jesse's arrival.
- Soren's books were present in Harper's Library as well as the other possible Old Builders' Libraries.
- The books are "Habits of the Endermen", "Walking Among the Endermen", "The Redstone Heart", and "A Man Forever Voyaging" in Episode 5, 6, 7, and 8 respectively.
- Harper and Facemeat both mention that The Old Buliders don't like being called The "Old Builders."
- It's possible that it's not the name of the group.
- This is ironic as Harper herself calls them "The Old Builders" several times throughout the Episode.
- Cassie Rose was probably a former Old Builder, as the Old Builders in The Games knows her and her pumpkin, as well as she knows the Portal Hallway, the Mansion Portal, and the Enchanted Flint and Steel.
- Sparklez determinately mentions that there was a another Old Builder temple on their world. He also mentions that there's a treasure in a deep basement which can possibly be an Enchanted Flint and Steel.
- Isa is possibly an Old Builder, because the Old Builders knew about the Eversource as well as Isa.
- However, Isa didn't recognize the exit portal in her world that leads to the Portal Hallway and it is implied by the Old Builders that there are several Eversource Chickens and they put crowns on them to tell them apart.
- The Old Builders seem to have fast reflexes and building skills. This is shown in Spleef where they build down to the surface in just a few seconds.
- Otto and Harper are the only confirmed Old Builders to not have any interest in forcing anyone to play in The Games.