| Issue | #28 |
| Published | [May] 1989 |
| Cover Price | 1.00 USD; 1.25 CAD |
| Pages | 36 |
| Editing | Robert Greenberger |
| Characters | Peacemaker [Chris Smith]; Duchess [Lashina]; Major Force [Clifford Zmeck] |
| Genre | Superhero; Spy |
| Pencils | Karl Kesel (signed) |
| Inks | Karl Kesel (signed) |
| Characters | Amanda Waller; Suicide Squad [Count Vertigo [Werner Vertigo]; Duchess [Lashina]; Nightshade [Eve Eden]; Shade, the Changing Man [Rac Shade]; Vixen [Mari McCabe]]; Checkmate [Harry Stein; Harvey Bullock; Black Thorn [Elizabeth Thorne]; Checkmate Knight [Gary Washington]]; Project Peacemaker [Peacemaker [Chris Smith]; Dr. Bridgette D'Abo]; Valentina Vostok; Wade Eiling; Captain Atom [Nathaniel Adam]; Sarge Steel; King Faraday; Flo Crawley; Warden John Economos; Murph [Daniel Murphy]; Cherie Chase; John Chase; Lois Lane; VILLAINS: Kobra; Blackadders |
| Synopsis | The various government agencies continue to wage war against each other, while the real threat... Kobra, prepares to strike against the world. |
| Genre | Superhero; Spy |
| Script | John Ostrander; Kim Yale |
| Pencils | John K. Snyder III (layouts); Karl Kesel (finishes) |
| Inks | Karl Kesel |
| Colors | Carl Gafford |
| Letters | Todd Klein |
| Notes | Story continued from CHECKMATE #16 and story continues in CHECKMATE #17. |
| Script | Bob Greenberger |
| Letters | typeset |
| Notes | Letters from readers - D. Sluss, Marson Fedrick, Deejay Dayton, Dale Coe, Donnie Matthews, Anthony Rapp and Charles D. Brown - and responses from Bob Greenberger. |