Unstoppable Gorg is another new indie release on Steam for both PC and Mac (as well as iOS). This game is a new take on the tower defense genre. The main gameplay may be pretty traditional, but the game has an amazing and unique retro 1950s vibe that manages to set it apart from other games.
The game has you tasked with protecting the human race from the villainous alien race the Gorg and their evil 
alien allies. Each of the 21 missions involves one or more motherships sending a variety of meandering aliens to abduct your hapless population. At the start of each level, you can pick a selection of satellites from the unlocked satellites list in the toolbox to bring into the mission. You can build this limited variety of satellites at specific points orbiting your planet, each equipped in its own special way to fight the Gorg. The main hook is the flexibility allotted to you: the aliens often change their planned paths but your towers are on a rotatable circle, so you can reorient them to the most effective spot. The trick is to figure out how to handle things when multiple paths of Gorg are rushing towards you while still meeting certain level goals. The difficulty is pretty nicely tuned, and even on the easier difficulties you need to use actual strategy instead of spamming attack towers to earn medals.
The levels are well-designed and interesting, each one usually including some kind of distinct trait or quality to distinguish it. For example, one mission might have radiation that slowly saps your tower’s health, while others lock certain orbits to prevent pivoting your towers, and one mission has the orbital spots rotating wildly out of control,
making placement delightfully random. Each level also has five medals to earn. These involve things like not losing any satellites, accumulating a set number of research points from labs, or becoming filthy rich. The trick is that some of the medals usually reward you in some way. For example, completing the money goal unlocks a challenge mode version of 
the map, while completing the research goal gives you tokens that unlock further upgrades for many of the satellites.
It’s not a lengthy game, and we managed to speed through the main campaign mode on easy in approximately four hours, although we didn’t unlock too many medals. When we upped the difficultly, it proved to be fairly tricky. There is a ton of replay value, as each mission offers four difficulties and tracks how many medals you earn in each. You can also unlock a challenge variant on each level, which switches up the level premise. Sometimes a level won’t allow energy-increasing satellites, or will double the number of units, but this basically ends up serving as a fun New Game Plus option to continue on with. If you manage to wipe the floor with that, there’s an arcade survival mode that becomes more complex as you unlock medals, and there are a ton of fun Steam achievements to unlock. In the end, it’s a solid tower defence game that has a nice, active aspect to things in terms of moving your towers around, but doesn’t really bring much innovation to the gameplay table. If you love tower defence, you’ll love this. If you’re not a fan then this probably won’t be the title to make you a believer.
But does Unstoppable Gorg ever bring atmosphere. The entire game is set in the world of a 1950s sci-fi movie, and as someone who loves ’50s sci-fi movies, it’s amazing how much the developers get right. Every level begins and ends with a cutscene that 
wouldn’t look out of place in Plan 9 From Outer Space. They use every trope in the book, including spinning newspapers, pie-plate UFOs on a string, gratuitous use of stock footage, cardboard box robots, and exploding miniatures. Amazingly, most of the footage is original material created by the team and most of the characters are played by Futuremark staff (the press kit cheerfully informs us that the only exception is the leader of the Brain Riders, who is played by “Finland’s premier burlesque dancer.” Informative). The music is bombastically sci-fi in all the right ways and manages to sound exactly like the best soundtracks from the ’50s. If you consider yourself a fan of ’50s cheese like The Day the Earth Stood Still, It Came From Outer Space, and When Worlds Collide, you’ll find a loving tribute in Unstoppable Gorg.
Final Verdict: Unstoppable Gorg is a well-crafted tower defense game with a pretty decent gameplay hook and an eye for setting and detail. There’s enough re-playability to keep you busy for a while, and the ’50s sci-fi aesthetic is amazingly well-realized. An excellent budget-price title.
Rating: 
This review is based on a review copy of the Steam version of Unstoppable Gorg provided by Futuremark.