Tech Tree mode


 * For the grid of all technologies, see Tech Tree.

Tech tree mode is an alternate "tech mode" to the sandbox, both in single and multiplayer custom games, where techs must be researched to unlock more advanced ones; and it is the pre-set tech mode along the entire campaign.

In this mode, all techs are organized in a Tech Tree window (image at the right), which can be accessed by clicking on the tech tree button (image below).

Research progress
Researching a technology is accomplished by crafting the different items available in it.

The research progress of each tech is show as a percentual bar. Each crafted item provides a short advance to progress bar. One item can be crafted more than once, but will provide a more diminishing progress each time it is crafted.

The progress made is shown by the green portion of the bar. And yellow portion shows how much an item will add to the progress bar if it's crafted. Items ordered to be crafted in crafting stations but not crafted yet are also show in the yellow portion.

This technological advance can be tracked in two places:
 * the tech tree window; and
 * the crafting area.

Locked / unlocked
In the crafting area, fully researched techs show an entirely green bar.

In the tech tree window, only techs being researched display the bar; and the unlocking progress is represented by the background color and a small icon on the top right, respectively meaning:

When starting a game in tech tree mode, all techs are locked, except: Basic Tool Making (the only starting tech);

And are unlocked by researching prerequisite technologies, except: Basic Woodworking (available after reaching level 2); and Basic Illuminating (available after reaching level 3).

Campaign
In the campaign mode, each new world begins with a more large portion of the tech tree unlocked.

* Except Basic Tool Making, the only unlocked tech. ** Specific tech tree, which includes Local Cuisine in tier 3, and Chitin Processing and Advanced Armor in tier 5.