Spread like a plague of tiles in Dupl, an IO game based on territory control and consuming all those around you.
Click each tile to increase the amount of "dots" in it, when you hit the 4th dot, you expand outward in 4 directions. Repeat this process to take over the world (of tiles).
There's a brief wait of a second between each action you take. This gives you a brief window to plan out your attack.
You can also domino your tiles by having multiple ones trigger an expansion at once.