Alas, although you thought you got rid of all the evil alien crystals when you finished playing Symbiosis, little did you know they were silently hiding, unemployed in Greenland, for the right time to strike again. Can your little plants brave the snow and defeat those purple baddies again? Play Symbiosis: Greenland, the next installment of the strategic tower defense game, to find out.

The rules are the same as in the previous game. Click or press [space bar] to place your plant on the board, then click it again if you'd like to change it's state. There's three to choose from: growth, attack, or defense. The closer a plant is to an enemy, the faster it will attack. Click on the spells to cast them. Optionally, there are keyboard shortcuts assigned to these tasks. Press [P] for pause, and [esc] to cancel any action. Get used to hitting the pause key, as you can adjust your plants and cast spells while paused, which can be vital to your strategy. Click a plant and drag to another plant to link those plants in symbiosis. The farther apart the plants, the greater the benefit to the attack and defense strength of the charged plant.

It's enjoyable but not necessarily challenging as you play through the levels for the first time. The difficulty comes in when you go back and ramp it up to try and pass the special challenge each level presents. Each time you pass a level you earn experience. When you level up you get skill points to use for upgrades. If you can't pass a challenge, earn a level or two and try again, or try rearranging already earned skill points. It would be nice to see something new in the gameplay, as Symbiosis: Greenland is essentially the same game as it's predecessor. But it worked well the first time, so it's hard to complain about an expansion. Now go and save the world again, please.

Play Symbiosis Greenland