It was directed by Godfrey Ho, using the pseudonym Godfrey Hall. Undefeatable borrows several plot points from the Sylvester Stallone movie Cobra.
The film features a notable fight scene towards the end approximately three minutes long. This fight is often cited as the worst fight scene ever filmed due to its poor close-up shots, slow movements, bizarre movements and actions, constant shouting, and needless shirt ripping. Also cited are strange maneuvers and plot changes – including a towel used to hold an arm and Kristi, with arm in sling, fighting with no apparent handicap or notice of arm.