- Awesome Music: The soundtrack, which features "Chaos" by Tim Skold, "Bled for Days" by Static-X, and "Crush 'Em" by Megadeth.
- Cliché Storm: SETH's speech, which is both bombastic and awesome and hilarious for sounding like every other speech given by an A.I. Is a Crapshoot villain ever. At the end he even basically declares himself God.
- Evil Is Sexy: The evil artificial intelligence SETH, when he eventually downloads himself into a Unisol body, is introduced in a Shirtless Scene and wears very form-fitting clothing the rest of the film.
- Idiot Plot: After the disastrous events of the first film, the U.S. military not only puts together a second Unisol project with even more dangerous Super Soldiers who are outright Immune to Bullets, but also networks all of them to S.E.T.H., an experimental artificial intelligence who can then easily take control of the base and lock out all human operators. On top of that, when the inevitable happens, it's pointed out that they can't simply bomb the base to stop S.E.T.H. and the Unisols because it's built on top of a massive storage of biological weapons.
- Magnificent Bastard: S.E.T.H. (Self-Evolving Thought Helix) is an artificial intelligence built to oversee the new generation of Unisols, Super Soldiers made from the bodies of dead U.S. soldiers. While initially benign, as soon as S.E.T.H. determines that he is to be disassembled following the project's shutdown, he has the Unisols' cranial implants surgically altered so they will obey only him and turn on their human controllers, before rewriting his program to make himself independent. S.E.T.H. manipulates a former technician involved with his construction, Squid, into building a Super-Unisol body for him so he can escape into the real world before killing him. In order to deactivate a kill switch command in his program, which he later manages to decipher on his own, S.E.T.H. has his soldier Romeo pursue Luc Deveraux and personally kidnaps his daughter Hillary, deciding to turn her into a Unisol as he thinks it will be for her own good. S.E.T.H. boasted of his plans to replace all humanity with Unisols, stating that where once he was a machine who yearned to be a man, he became far more than either.
- Special Effect Failure: There are some painfully obvious CGI effects, for a $40 million budgeted movie. Especially jarring when you consider that the rest of the series have much more impressive effects despite being no more expensive than $20 million, or heck, $11 million.
- Took the Bad Film Seriously: Michael Jai White as the primary villain SETH gives a genuinely earnest performance without going overboard (along with Van Damme, but he has Dull Surprise in literally everything he's ever done). By contrast, professional wrestler Bill Goldberg, who plays the secondary villain, is Chewing the Scenery the entire time.note
- What an Idiot!: SETH kills Cotner, who, along with Deveraux, knows a computer code, which SETH needs to avoid permanent memory erasion. Not that it stops him from becoming a UniSol, let alone cracking the code by himself...
YMMV / Universal Soldier: The Return