This addon, mtfa_contest-dec04.wad, is a collection of levels from the level design contest held in December 2004. Participants were given from December 1 through December 26 to design an original level supporting match and tag. Some support chaos and capture the flag gameplay as well, but not all.
On December 27, the level pack with the following levels was released onto the message board for judging:
| # | Level Name | Author | Score |
|---|---|---|---|
| MAP01 | Florid Crater Zone | FuriousFox | 6.222 |
| MAP02 | Sandy Beach Zone | Some guy | 7.000 |
| MAP03 | Diamond Duel Zone | Sonicandtails218 | 4.400 |
| MAP04 | Wrecked Satellite Zone | Shadow Hog | 6.000 |
| MAP05 | Meadow Conflict Zone | hotdog003 | 5.400 |
| MAP06 | Floating Factory | FireKid | 4.750 |
| MAP07 | Sonichero's Palace | Joe | 2.556 |
| MAP08 | Fluff Fight Zone | SRB2-Playah | 5.111 |
| MAP09 | Lunar Facility Zone | FuriousFox | 7.500 |
| MAP10 | Thunder Citadel Zone | Mystic | 7.500 |
| MAP11 | Verdant Valley Zone | Shuffle | 5.875 |
| MAP12 | Winter Wonderland | Snort | 3.889 |
| MAP13 | Winter Valley Zone | Some guy | 7.556 |
| MAP14 | Barrel Barrage Zone | Blue Blur | 4.111 |
| MAP15 | Ruined Fortress Zone | SRB2-Playah | 7.333 |
| MAP16 | Fusion Reef Zone | a441 & SSNTails | 6.143 |
| MAP17 | Emerald Beach Zone | Senku | 4.375 |
| MAP18 | Illustrion Zone | Jason the Echidna | 7.000 |
| MAP19 | Green Patch Zone | Linkman90 | 5.375 |
| MAP20 | Colorpool Arena | Ex_Sonic | 5.429 |
| MAP21 | Ex Arena | Ex_Sonic | 5.750 |
| MAP22 | Space Fight Zone | Some guy | 6.000 |
| MAP23 | MI | Some guy | 1.111 |