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Transmorphers is a "mockbuster" of Transformers from studio The Asylum. In the film, the underground remnants of the human race fight to take the surface back from alien robots.
Yes, all the robots look this bad or worse.
In the year 2009, humanity reaches out and contacts life that has been discovered on another planet 20 million light-years away from Earth. Five years after the message of peace is sent out, Earth is suddenly attacked by alien robots. A few hours after the initial attack ninety percent of the Earth's population is killed, and the remnants flee underground. The aliens which now control the surface change the atmosphere which blocks the sun and plunges the Earth into eternal darkness (see The Matrix).
300 years later, what's left of the human race discovers that the robots are moving in on their position to eliminate them once and for all. This forces General Van Ryberg to de-thaw Warren Mitchell and his friend Itchy from the cyrosleep in which they were placed as punishment for staging a coup five years prior to help with the fight. Mitchell has problems with authority, especially with Ryberg for both having him put into cryosleep, and for marrying his former love, Karina Nadir, while he was under.
Van Ryberg puts together a task force led by Mitchell to go above-ground and capture a robot alive for testing. The plan goes awry, however, causing the robot armies to get a fix on the human resistance's position. To make things worse Karina, a fighter pilot, is downed behind enemy lines. Mitchell is forced to save her, while also attempting to destroy a nearby robot control tower which is spawning a seemingly limitless supply of robot troops.
Most of the fighting takes place on this one set.
While Van Ryberg and the human resistance fights a last ditch battle against a never ending army of robots, Mitchell and his crew get to the robot control tower where they find Karina and her co-pilot. Once inside the tower they realize that it is not just a tower, but actually a giant robot (see Mega Maid). They now have to race against the clock, as the human resistance is being beaten back by the robots, to break into the tower's control room. While trying to break the anti-human defenses of the robot control room, Mitchell finds out he is actually a cyborg (see Blade Runner) created by the humans to fight the aliens (unbekownst to anyone but Dr. Voloslov Alextzavich his creator), and it was a malfunction in his hardware that caused him to break orders and be cryofrozen. With this new found knowledge, Mitchell is able to breach the control room's defenses, and use his own cyborg body to destroy the tower, defeating the robot army.