Stargate upgrade crystals

Classic Stargate can be upgraded to Universe, Milky Way, Tollan, or Pegasus Stargate. After crafting an upgrade crystal, right-click the classic Stargate with it.

You can see all types of Stargates in the Technological blocks and all gate variants in the Stargate variants sections.

The upgrade is a one-time action and cannot be undone. Once you upgrade the gate, you can’t change it to another one. Only gate variants can be changed.

Universe Stargate

Milky Way Stargate

Tollan Stargate

Pegasus Stargate