Like Dune II: Min­ing on some moon pro­tect­ing the base against the lo­cals. Looks good, but it's not my thing. When you're re­al­ly into these things you can cal­cu­late the op­ti­mal strat­e­gy, and to me that is to much like real work and not fun. Based on the speed of the mon­sters, price of the tur­ret, val­ue of the kills, ef­fec­tive range of the tur­ret's po­si­tion and val­ue of the base you can de­ter­mine what to do, but that is prob­a­bly bor­ing. With enough re­search a game al­ways get un­bal­anced and you'll end up do­ing only the sin­gle most ef­fec­tive task and noth­ing else.