Myth 2 lets you play the campaign together and with tweaks even lets other people play the enemies (grossly OP in most cases). There's no basebuilding though and it may be hard to get a hold of.
If 2 players choose the same color in Age of Empires 2, they will share a civ. Both players can do whatever they want, it usually works best to give military units to one player and econ to another.
In Command and Conquer Generals: Zero Hour, there are many maps where one player can turtle up for his allies while they spam units.
If 2 players choose the same color in Age of Empires 2, they will share a civ. Both players can do whatever they want, it usually works best to give military units to one player and econ to another.
In Command and Conquer Generals: Zero Hour, there are many maps where one player can turtle up for his allies while they spam units.