I prefer the tower defense games where you just build towers and maze them. This game has the following elements that I do not particularly like: 1. A separate unit that I can control and attack with. This means I have to manage my towers and my unit. It's not a bad thing, it's just not my preference. 2. The ability for enemies to destroy my towers. Overall, this is still a great game and if an expansion came out, I'd probably buy it. It's just a really good game.
Overall, it's a great game with a lot of content. The occasional humor in a otherwise very serious situation is something I really enjoyed. Some things I'd like to touch upon: 1. Health regeneration is non-existent. The only way to get health is by picking up health packets from enemy kills or by going to a control point (which is not possible if you're in the middle of a boss fight). There is an item you can get later that gives you health on launch hits, but that came after I already beat the main story. You WILL die a lot during fights because you get side-swiped with a big or explosion that takes you from 100% to 10% HP in an instant. 2. You lose 10% of your points/currency each time you die. This is a frustrating mechanic, especially in boss fights where beating them isn't straight-forward. For example, Hartman(?), the boss in the Alan Wake sidequests. Everything is so dark and the guy has a strong ranged attack, you will die many times until you figure out how he is beaten because his fights are a combination of shooting and puzzle solving. These were not enjoyable.