
Luckily, you can spend real cash to buy crystals! Hooray. Unfortunately, the odds are stacked against you and it’ll take an age to earn enough crystals to get anywhere by normal means. These offer enduring bonuses such as reduced build costs, potentially having dramatic a dramatic effect on gameplay.

Should you decide to save up, there’s a luck-based card system to drop your excess on. Even if you score aces each time you play, however, you won’t have enough crystals to fund best path revelation each mission. This persistent resource is slowly accumulated by completing stages, the sum awarded dependent upon your performance.

In the event you can build yourself a maze, you’ve got the option of spending crystals to reveal the most effectively squiggely path. With a tap and selection from a radial menu, upgradeable towers plop down on preset squares, sometimes allowing you to redirect the mindless flow of targets to your advantage. Flames incinerate tight groups of small biological units quite well, bladed stabber towers nicely puncture mechanical foes, et cetera. Enemies assume different shapes, sizes, and armor types, and towers gain different strengths against each. You cobble together said defenses with the guts and gore, or a nameless resource, left by their corpses. They trample blindly toward it, ignoring your defenses until they find themselves without a route to their objective. Defense Technica ($2.99) gives you a power core whose innards are particularly delicious looking to the alien hordes. It’s standard tower defense every sense, from Com2uS, the guys behind the game actually titled Tower Defense ($0.99).
