Iron Grip: Warlord is a game built on cool concepts that could have used refinements, and a bit more variety. I assume you saw that it's an FPS/Tower Defense game. There's not a whole ton of these, so it's good to see another option. Iron Grip: Warlord is neither among the best FPSes nor the best TDs. In a number of ways it falls short. Sound design is nothing special. The sound and music isn't bad, but it's not memorable at all. However, the game has a cool aesthetic. The visuals aren't very unique or inspired, but at least seeing some airships and soldiers in suits of conquistador or gladiator armor and stuff like that strays from the norm and sets itself apart a bit.
When it comes down to gameplay, I also have mixed feelings. It's tough and punishing, sometimes fun and sometimes bland. But at least it engages you. If you don't carefully plan, and then react on the fly (you get a bit of time before the first wave and then it's continuous), you will fail. The game allows you to rapidly switch between your FPS view (where you'll do all your combat) and your overhead build view (where you'll build one of a few buildings or traps), and it's kind of engrossing that the game doesn't give you any shortcuts around the map, or allow you to take breaks. The game plays at a rapid pace if you're on a small map. Enemies are good shots, and numerous. You need to choose your emplacements carefully, and your personal upgrades perhaps even more carefully. There's nothing worse than picking up a sniper rifle and shotgun and not being able to take down tanks, or any troops within long or close range. The build view is okay I suppose, it just takes a second to get used to. You'll understand if you try the game. My major complaint with building though is a slightly obvious one. There's not enough options. That really is dissapointing when you realize that there's essentially two towers-one for people, and one for vehicles- and two traps-one for people, and one for vehicles- and two assist buildings- a supply building, and a rebuild for your base. So it's very limited. You'll also find yourself counting on any member of your team to keep themselves upgraded and reinforced, because if a path even slightly starts to fall, you're screwed. Medium difficulty, is perhaps a little bit more than one might expect. You have to juggle a lot of problems at once. When it comes down to it, there's not a ton of enemy variety, but the ones that are in the game feel interesting enough(well except the cannonfodder), filling roles between being tanks, asassins, supports, and generally tough commanders.
So, in summary, the game is not going to blow you away by any measure. That said, for the price it's pretty fair. $8 for a decent co-op game isn't a bad deal, even if you only play a little bit. Just make sure you play co-op, as bots can't compare and very few people play online. 6/10