a. Extra Abstract or Unreal Spaces
| xa01 | Black Angels | L. Pulsipher (CE 1) | 7 |
| xa02 | Defeat the Devil Diplomacy | Michael Hopcroft | 7 |
d. Added Area Not Directly Connected to Main Board
| xd01 | Sacred Rhinoceros I | Michel Liesnard (includes xd02) | 7 |
| xd02 | Sacred Rhinoceros II | Michel Liesnard (included with xd01) | 7 |
| xd03 | Sacred Rhinoceros IV | M. Liesnard, F. Bido, P. Feyers, M. Lambotte, and Jef Bryant | 7 |
m. Youngstown Variants
| xm01 | Youngstown Variant II | Rod Walker | 10 |
| xm02 | Youngstown Variant IV (“III”) | Rod Walker and A. Phillips | 10 |
| xm03 | Youngstown Variant V (“IV”) | Rod Walker and M. Weidmark | 10 |
| xm04 | Youngstown Variant VII | Rod Walker and J. Massar | 10 |
| xm05 | Youngstown Variant VIII | Rod Walker and Dick Vedder (requires xm02) | 11 |
| xm06 | Youngstown Variant IX | Rod Walker and Dick Vedder | 10 |
| xm07 | Youngstown Variant X | Rod Walker and Dick Vedder | 9 |
| xm08 | Youngstown Variant XI (Ushindi) | Rod Walker and Dick Vedder | 8 |
| xm09 | Youngstown Variant Tenth Anniversary Edition | Rod Walker et. al. (includes YV II thru XII complete) | |
| xm10 | Youngstown Variant VI | Rod Walker and Richard Walkerdine (British Version) | 10 |
| xm12 | Youngstown Variant III | Rod Walker and Schaefer | 10 |
| xm17 | LiMa 3 (a Youngstown Supplement) | J. Macedoni and M. Liesnard | 10 |
| xm18 | LiMa 5 (a Youngstown Supplement) | J. Macedoni and M. Liesnard | 10 |
| xm19 | Youngstown XIII | Jeff Suchard, et. al. | 14 |
| xm20 | Youngstown XIIIb | Borger Borgerren | 14 |
| xm21 | Youngstown XIV | Borger Borgersen et al | 14 |
| xm22 | Youngstown XV | Chris Warren et al | 21 |
| xm23 | Youngstown IVa | Rod Walker, A. Phillips, Ken Lowe, Jon Monsarret | 10 |
| xm24 | LiMa 5 – Definitive | M Liesnard, J-P Macedona, G.A. Bryant and P. Lafontaine | 10 |
o. Other Designs with Large Areas Added East and/or South of the Main Board
| xo01 | L’Imperialisme I (ex “xm11”) | Lew Pulsipher | 8 |
| xo02 | L’Imperialisme II (ex “xm14”) | Lew Pulsipher and Fred Davis (includes xo03 and xo04) | 7 |
| xo03 | L’Imperialisme II-A (ex “xm15”) | Lew Pulsipher and Fred Davis (included with xo02) | 8 |
| xo04 | L’Imperialisme II-B (ex “xm16”) | Lew Pulsipher and Fred Davis (included with xo02) | 7 |
| xo05 | Extended Diplomacy (ex “xm13”) | Peter Scribner | 7 |
r. Board and Rules Changed
| xr01 | Absurdity Diplomacy | Fred Davis | 6 |
| xr02 | Absurdity Diplomacy II | Fred Davis | 6 |