| 0 | - | cover | 1 | pencils: Ron Frenz; inks: Joe Sinnott | Thing; Quasar; Aquarian; Klaw |
| 1 | - | credits, title page | 1 | letters: typeset | |
| 2 | Indicia | credits, title page | 1 | pencils: Jim Salicrup; inks: Jim Salicrup; colors: Jim Salicrup | Two-in-One Twins [Mark Gruenwald (left head); Ralph Macchio (right head)] |
| 3 | Contents | table of contents | 1 | letters: typeset | |
| 4 | Project Prelude | foreword, introduction, preface, afterword | 1 | script: Ralph Macchio | |
| 5 | Foreword | foreword, introduction, preface, afterword | 1 | script: Mark Gruenwald | |
| 6 | Marvel Two-in-One #53 | cover reprint (on interior page) | 1 | pencils: John Byrne; inks: Joe Sinnott; letters: Gaspar Saladino; editing: Roger Stern | The Thing [Ben Grimm]; Quasar [Wendell Vaughn] |
| 7 | The Pegasus Project Part One The Inner War! | comic story | 17 | script: Mark Gruenwald, Macchio; pencils: John Byrne, Sinnott; inks: Sinnott; colors: B. Sharen; letters: Gaspar Saladino, D. Albers; editing: Roger Stern | The Thing [Ben Grimm]; Myron Wilburn; Quasar [Wendell Vaughn] (origin); Fantastic Four [Human Torch [Johnny Storm] (flashback); Mister Fantastic [Reed Richards] (flashback); Invisible Girl [Sue Richards] (flashback)]; Crusader [Bob Grayson; Marvel Boy] (death in flashback); Dr. Gilbert Vauhn (flashb |
| 8 | Marvel Two-in-One #54 | cover reprint (on interior page) | 1 | pencils: George Pérez; inks: Terry Austin; editing: Stern | The Thing; Deathlok [Luther Manning]; Quasar [Wendell Vaughn]; Thundra |
| 9 | The Pegasus Project Part Two Blood and Bionics | comic story | 17 | script: Mark Gruenwald, Macchio; pencils: John Byrne, Sinnott; inks: Sinnott; colors: Sharen; letters: Costanza; editing: Stern | The Thing [Ben Grimm]; Deathlok [Luther Manning] (death); Quasar [Wendell Vaughn]; Thundra; Bill Foster [Giant-Man]; Poundcakes; Titania; Screaming Mimi; Letha; Herkimer J. Oglethorpe; Dr. Tom Lightner; Nuklo; Wundarr (cameo) |
| 10 | Marvel Two-in-One #55 | cover reprint (on interior page) | 1 | pencils: Keith Pollard; inks: Joe Sinnott; editing: Stern | The Thing [Ben Grimm]; Giant-Man [Bill Foster]; Nuklo |
| 11 | The Pegasus Project Part Three Giants in the Earth | comic story | 17 | script: Mark Gruenwald, Macchio; pencils: John Byrne, Sinnott; inks: Sinnott; colors: Sharen; letters: Costanza; editing: Stern | The Thing [Ben Grimm]; Giant-Man [Bill Foster, as Black Goliath in flashback]; Quasar [Wendell Vaughn]; Thundra; Titania; Herkimer J. Oglethorpe; Henri Sorel; Wundarr (also in flashback); Nuklo; Goliath (flashback); Man-Thing (flashback); Ms. Marvel [Carol Danvers] (flashback); Tiger Shark (flashbac |
| 12 | Marvel Two-in-One #56 | cover reprint (on interior page) | 1 | pencils: John Byrne; inks: Terry Austin; editing: Stern | The Thing [Ben Grimm]; Thundra |
| 13 | The Pegasus Project Part Four The Deadlier of the Species! | comic story | 17 | script: Mark Gruenwald, Macchio; pencils: George Pérez, Gene Day; inks: Gene Day; colors: Sharen; letters: Irv Watanabe; editing: Stern | The Thing [Ben Grimm] (also in flashback); Thundra (also in flashback); Quasar [Wendell Vaughn]; Wundarr; Giant-Man [Bill Foster] (also in flashback); Grapplers [Poundcakes; Screaming Mimi; Titania (also in flashback); Letha]; Dr. Tom Lightner; Nuklo (flashback) |
| 14 | Marvel Two-in-One #57 | cover reprint (on interior page) | 1 | pencils: George Pérez; inks: Al Milgrom; editing: Stern | The Thing [Ben Grimm]; Giant-Man [Bill Foster]; Quasar [Wendell Vaughn]; Wundarr (inset) |
| 15 | The Pegasus Project Part Five When Walks Wundarr! | comic story | 19 | script: Mark Gruenwald, Ralph Macchio; pencils: George Pérez, Gene Day; inks: Gene Day; colors: Sharen; letters: Costanza; editing: Stern | The Thing [Ben Grimm]; Wundarr; Giant-Man [Bill Foster]; Thundra; Quasar [Wendell Vaughn]; Deathlok (on monitor); Nuklo (on monitor); Grapplers [Screaming Mimi; Poundcakes; Letha; Titania] (on monitors); Solarr; Electro; Klaw; Dr. Thomas Lightner; Cosmic Cube; Dr. Margaret Mayfair; Dr. Wilburn; |
| 16 | Marvel Two-in-One #58 | cover reprint (on interior page) | 1 | pencils: George Pérez; inks: Terry Austin; letters: Gaspar Saladino; editing: Roger Stern | Thing [Ben Grimm]; Quasar [Wendell Vaughn]; Thundra; Aquarian [Wundarr]; Giant-Man [Bill Foster] |
| 17 | The Pegasus Project Part Six To the Nth Power! | comic story | 18 | script: Mark Gruenwald, Ralph Macchio; pencils: George Pérez, Gene Day; inks: Gene Day; colors: Gafford; letters: Costanza; editing: Roger Stern | the Thing [Ben Grimm]; Aquarian [Wundarr] (introduction, origin); Klaw; Giant-Man [Bill Foster]; Thundra; Quasar [Wendell Vaughn]; Solarr (flashback); Nth Man [Tom Lightner, also as Blacksun in flashback]; Captain America [Steve Rogers] (flashback); Deathlok (flashback); Human Torch [Johnny Storm] ( |
| 18 | Marvel Two-in-One #60 | cover reprint (on interior page) | 1 | pencils: Bob Budiansky; inks: Joe Rubinstein; letters: John Costanza; editing: Stern | The Thing [Ben Grimm]; Alicia Masters; Impossible Man; Blastaar (statue); Doctor Doom (statue); Diablo (statue) |
| 19 | Happiness Is a Warm Alien! | comic story | 17 | script: Mark Gruenwald, Macchio; pencils: George Pérez, Gene Day; inks: Gene Day; colors: Roger Slifer; letters: Costanza; editing: Stern | The Thing [Ben Grimm]; Reed Richards [Mister Fantastic]; Impossible Man; Alicia Masters; Yancy Street Gang; Mr. Fogarty; Blastaar (statue); Sandman (statue); Doctor Doom (statue); Diablo (statue); Ultron (statue); Wizard (statue); Mark Gruenwald (cameo); Ralph Macchio (cameo); George Pérez (cameo); |
| 20 | Project: Pegasus | illustration | 1 | script: Mark Gruenwald; pencils: Higgins; inks: Higgins; letters: Tom Orzechowski; editing: Roger Stern | |
| 21 | Thing | character profile | 3 | script: Mark Gruenwald, Peter Sanderson, Steve Saffel; pencils: John Byrne; inks: Josef Rubinstein, James Fry; colors: Andy Yanchus; letters: Brenda Mings; editing: Mark Gruenwald | Thing [Benjamin Jacob Grimm; Ben Grimm]; Colosus |
| 22 | Quasar | character profile | 2 | script: Mark Gruenwald, Peter Sanderson, Steve Saffel; pencils: Mark Gruenwald; inks: Joe Rubinstein, James Fry, Mark Alexander; colors: Andy Yanchus; letters: Brenda Mings; editing: Mark Gruenwald | Quasar [Wendell Vaughn]; Thing [Ben Grimm] |
| 23 | Foster, Bill | character profile | 2 | script: Mark Gruenwald, Peter Sanderson; pencils: Mark Bright; inks: Josef Rubinstein; colors: Andy Yanchus; letters: Brenda Mings; editing: Mark Gruenwald | Bill Foster [William Barrett Foster; Black Goliath; Giant-Man]; Goliath [Henry Pym]; Power Man [Luke Cage]; Poundcakes; Titania |
| 24 | Aquarian | character profile | 2 | script: Mark Gruenwald, Peter Sanderson; pencils: Mike Harris; inks: Josef Rubinstein; colors: Andy Yanchus; letters: Brenda Mings; editing: Mark Gruenwald | Aquarian [Wundarr]; Man-Thing |
| 25 | Back Cover | promo (ad from the publisher) | 1 | pencils: Ron Frenz; inks: Joe Sinnott | Nuklo; Deathlok; Solarr; Thundra; Impossible Man; Poundcakes |