Very enjoyable sequel to Defense Grid (DG). Improvements over the original edition were the incorporation of aspects of the “Command Tower” into the Boost tower. The Boost tower does add a bit more of nuance then the original edition. Initial maze creation is less costly with the Boost towers, and careful placement of the Boost tower is still essential in winning the game. If you’ve played the extended versions of the original DG, you’ll find that you will quickly be able to excel at this version. While the Orbital Laser was the only choice of off-world help in the original edition, DG2 does a very good job in expanding the options to allow tower boosts, resource (money) boost, and more. Some levels are well suited to these new options, where the Orbital Laser would have been over-kill or less challenging if used.
Well worth the money, and even better if reduced via a Steam sale price :)