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Bonus Points


The "Hard Grey" Vectoids always seem to be transporting a yellow energy cell. Destroy this cell to receive a bonus point. Bonus points can be spent on booster towers or can be used to upgrade your interest rate or buy you 5 extra lives.

Damage and Range Booster towers
There are 2 types of booster tower, both cost 1 bonus point to construct, neither have any form of attack. Instead of attacking they increase the damage or range of any tower they are linked to. They automatically link to towers you place them close to. The link is indicated by a line.

The damage tower will increase the damage of all linked towers by 25%. The range tower increases the range of linked towers by 25%.

The effects of the booster towers stack. This means that a tower in range of 2 damage towers will have its damage increased by 50%

Increase Interest
At the start of each level your banked money receives interest. The interest rate can be increased by spending a bonus point on the interest rate option.


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