Tiers

In Terra Nil, a restoration is separated in three Tiers.

Tier 1

In the first tier, your goal is to cleanse polluted land or ocean and grow Greenery.

Tier 2

The second tiers is aimed to create Biomes. To do so, it requires specific conditions and elements, like trees or coral, for example.

Tier 3

Tier 3 is the last Tier of restoration, consisting in recycle buildings and introduce fauna.

Recycling

Recycling building can be done with several Buildings, depending on the map.

Animal scanning

Scanning Animals is the last part of Tier 3 and requires to build an Animal Observatory. On each map, there are six different species to scan, with at least three to scan to complete the tier.

Climate

On every Region except Temperate, there can be a last Buildings tab that is not numbered. You can find there buildings to manipulate the climate.