En un futuro no tan lejano, el boxeo habrá traspasado las fronteras de la lucha entre seres humanos y se habrá convertido en un deporte reservado a los robots de 90 kilos y más de 2 metros de altura. Charlie Kenton (Hugh Jackman), un boxeador fracasado por culpa de los robots, se ve obligado a sobrevivir ensamblando las piezas de los nuevos luchadores. Los conocimientos que irá adquiriendo le permitirán construir un robot campeón, una máquina casi indestructible, que le otorgará la gloria. Para ello contará con la ayuda de su hijo, Max (Dakota Goyo).
Guión: John Gatins
Historia original: Dan Gilroy, Jeremy Leven
Coproducción: Rick Benattar, Eric Hedayat
Producción: Shawn Levy, Susan Montford, Don Murphy, Robert Zemeckis
Producción ejecutiva: Josh McLaglen, Mary McLaglen, Jack Rapke, Steven Spielberg, Steve Starkey
Música: Danny Elfman
Fotografía: Mauro Fiore
Montaje: Dean Zimmerman
Casting: Richard Hicks, David Rubin
Diseño de producción: Tom Meyer
Dirección artística: Seth Reed, Jason E. Baldwin, Jeff Wisniewsky
Vestuario: Marlene Stewart
Maquillaje: Stephanie Arble, Eleyna M. Brandt, Clifton Chippewa, Elizabeth Cortez, Natalie Driscoll, Karri Farris, Christin Hanson, Robbin Hawthorne, Kimberly Jones, Lauren Kress, Ann Masterson, Meshelle Melone, Jeannette Moriarty, Daniel Phillips, Bree Shea, Pamela S. Westmore, Erin Wooldridge
Departamento artístico: Jennifer Bash, Joseph F. Beeco, Michael C. Biddle, Jamie Bishop, Erik Boring, Michael Patrick Carmody, Andrea Carter, Tim Croshaw, Val I. Deikov, Daren Dochterman, Joe Dunckley, William Eliscu, Lisa Fiorito, Tim Flattery, Chris Frankovich, Ceri Glowacki, Trevor Goring, Megan Greydanus, Jourdan Henderson, Michael Anthony Jackson, Tex Kadonaga, Braun Keith, Justin Noble Lang, Andrew H. Leung, Mike Maher, Bobby Mara, Victor James Martinez, Steven B. Melton, John Millard, David Moreau, Fred O'Connor, Anne Porter, Rick Radomski, Jamie Rama, Bobby Rhodes, Jessica Ripka, Bradley Rubin, Mark Sanger, Scott Schutzki, Mark Sejnowski, Theodore Sharps, Jeff Shewbert, Carl F. Shuffett, Tom Sparkman, Mike Stassi, Miles Teves, Jeremy Thompson, Alyssa Toft, Leslie A. Tokunaga, Joel Venti, John Villarino, Jim Warren, Douglas Womack, Beverly Woodbeck, Kris Nagle
Sonido: James Ashwill, Steve Cantamessa, Derek Casari, John Cucci, Susan Dawes, Neal Garon, John Guentner, Warren Hendriks, Craig Henighan, Scott La Rue, Paul Massey, Rob Nokes, Greg Steele, Bruce Tanis, Gary Thomas
Efectos especiales: K.C. Bartos, Steve Buttermore, Lou Carlucci, Ken Cornett, Noah DePietro, Joe Digaetano, Argie M. Floyd, Steve Galich, Jesse Gee, Jared Guenther, Allan B. Holt, Jason Lopes, Craig Mason, Kevin McTurk, David Merritt, Steven Munson, Angela Novak, Edward T. Reiff Jr., David Revel, John Rosengrant, Garth Steinheimer, Cole Taylor
Efectos visuales: Dan Akers, Tim Alexander, Ron Ames, Nicole Arnell, Steve Avoujageli, Emi Baba, James Bancroft, Leonard Barrit, Jennifer Bash, Addison Bath, Geoffrey E. Baumann, Brian Begun, Krista Benson, Margaret Bright-Ryan, Daniel Brimer, Randy Brown, Daniel Buck, Andrew Byrne, Howard Cabalfin, Ryan Champney, Viki Chan, Jason Chen, Jesse James Chisholm, Janice Barlow Collier, Kyle Collins, Matthew Collorafice, Wesley Cronk, Mike Dalzell, Marie Victoria Denoga, Glenn Derry, Megan Dolman, Mark Duckworth, Gregory Duncan, Edgar Díaz, Steven Fagerquist, TJ Falls, Xou Fang, Forest Fischer, Thomas H. Frederick, Janet Freedland, Toby Gaines, Erik Gamache, Gillian George, Maribeth Glass, Matthew Gratzner, Kirstin Hall, Jacob Harris, Brett Hartley, Josh Herman, Nicole Herr, Luke Hippely, Carl Horner, Dave Horowitz, Heather Hoyland, Aruna Inversin, Isaac Irvin, Helen Jen, Eugene Jeong, Will Johnson, Mark Justison, Nicholas Kim, Linghao Li, Katie Linahon, Ting Lo, Jo Lockman, Michael Maloney, Michael Melchiorre, Steve Miller, Natt Mintrasak, Young Joon Mok, Monet Monge, Carlos Morales, Cathy Morin, Connor Murphy, Erik Nash, Ben Neall, James Orlik, Brandon Ottenbacher, Molly Pabian, Paul George Palop, Hyun Bo Park, Dan Patterson, Bethany Pederson, Dawrath Phoue, Teddy Phuthanhdanh, Tom Piedmont, Anthony Pintor, Dave Preciado, Francis Puthanangadi, Ryan Reeb, Steve Rosenbluth, Kate Sabicer, Casey Schatz, Rene Segura, Shawn Shaman, Katryna Shattuck, Justin Shaw, Clancy Silver, Brad Simonsen, Aaron Singer, Sally Slade, Brian Smallwood, Ryan T. Smolarek, Kristen Swanson, James Sweeney, Hirofumi Takeda, Danny Gordon Taylor, Can Tuncer, Thomas Dane Wagener, Kevin Wang, Bethany Wilksen, Jody Wilson, Krystina Shales Wilson, Niki Yoblonski
Animación: Erik Baker, David M. Breaux Jr., Brian G. Curtis, Tom K. Gurney, Jordan Harris, David Lam, Pericles Michielin, Tim Ranck, Roy Sato, Althea Suarez Gata
Casting: Mia Cusumano, Tracy Dixon, Kate Hubbell, David Kramer, Caitlin McKenna-Wilkinson, Carrie Ray, Olivia Thomas
Vestuario: Kate Bennett, John Casey, Michele Diem, Lisa A. Doyle, Ann Foley, Allison Harvey, Kristi Hoffman, Michelle Hutchins, Benny Lumpkins Jr., Nicole Leitner, Warren Manser, May McClurg, Gina Nalli, David Page, DeAnna Park, Tony Swatton, Sabra Temple, Stacy L. Tyson, Bernadine Vida
Departamento editorial: Matthew G. Carson, Marisa Clayton, Adam Gerstel, Skip Kimball, Jennifer Stellema
Departamento musical: Steve Bartek, T.J. Lindgren, Dennis S. Sands, Edgardo Simone, David Slonaker, Gina Zimmitti
Departamento de transportes: Ronald Augustus, Mike Bilkovic, Steven Docherty, Mark Dometrovich, Scotty Goudreau, David Hyder, Robert Middendorff, Reno S. Mifsud, Frank Morreale, Billy Neckrock, Franco Rea, Robert Rice Sr., Timothy Schewee, Tim Sisson