Build defensive engineers units on a grid simulator, while monster invaders units try to breach
through your defenses.
At the start of each level you may choose several engineers units to be used in battle, along with the
essential engineers unit which produces crystals. Collect crystals to build defensive masters units, and
prevent the invaders from reaching your colony.
To build a engineers unit, click on it and then click on an available tile to place it. You can also sell units by
clicking on the sell button and then clicking on a unit. to show the health of all units and
monster invaders.
9Apps 4.9
