A Vengir Swordsman ready to examine a ruin.

Ruins are structures that provide a reward when examined by a unit. Examining a ruin requires a unit to start the turn on the ruin and consumes the unit's actions for that turn (like capturing a village). Possible rewards include:

Ruins can spawn on all types of terrain except shallow water. However, ruins cannot spawn next to a village, city, or another ruin.

Tiles with ruins cannot be developed until the ruin is examined. For example, a player cannot clear or build a Lumber Hut on a forest tile with a ruin. Also, it is possible for a resource (such as fruit or crop) to appear on a tile with a ruin, but the resource will remain hidden until the ruin is explored. In addition, ruins cannot be destroyed.

Strategy

It is recommended that early-game the focus be on expansion and capturing villages instead of examining ruins. However, examine ruins that otherwise may be taken by enemies.

Because of the variety of possible rewards, it can be risky to go for ruins and rely on them. This is especially true in the early game whether the player should get to a ruin or a village. If the ruin is in a place where there is no way an enemy can grab the ruin, it is recommended to expand and explore the map. However. if the ruin is very close to an enemy, it is recommended to explore the ruin as there are many things an enemy can receive from a ruin, and the worst being them getting a free super unit very close to the player's territory. 

Trivia

References

  1. Midjiwan on Twitter
Ruin Rewards
Battleship, Explorer, Navalon, Population Growth, Stars, Super Unit, Technology
Game Mechanics
Buildings and Structures, Cities, City Connections, Combat, Game Modes, Movement, Player Relationships, Population, Ruins, Score, Stars, Technology, Terrain, Tribes, Units, Unit Abilities, Unit Skills, Villages
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