Here are some modified maps of Red Alert 3.
Recommended for 4 vs 4 brutal.
Two extra brutal AI players are added to the maps (Lime and Pink), they consider the teams with human players as enemy.
Added some ore mines and oil derricks.
The maps can be used for 6 vs 2, 5 vs 3, 3 vs 5 or 2 vs 6.
And, if you are master in RA3, how about 1 vs 7 brutal?