Grid Defense is a classic tower defense with strategy and puzzle-solving thrown in for a good mix. It's designed to be one thing and one thing only, a straight-forward to the point tower defense experience.
The game features a non-linear tech-tree in which the player must choose the their prefer upgrade and towers to unlock. The level are designed to be puzzle like where planning ahead is a must for success. There are multiple viable strategies to complete each of them. The game also feature a load-out system where the type of tower that can be brought into a level is limited, forcing player to make strategic decision.
24 maze like levels
use different combination of towers to fit individual play style and strategic requirement
multiple ways to beat each level, lots of replayability