Research Door (Double)

Research Door (Double) is a researchable entry in Foundry with a relatively small research cost. It is unlocked through the standard research system rather than being available from the start.

Its listed research cost is:

• 40 of the first required material
• 40 of the second required material
• 20 of the third required material, at 20 seconds per item

No additional gameplay details are provided in the source, so the main consideration is simply meeting the research requirements before it becomes available.