You need to have 2 characters jacked into the Matrix.
They need to hack 3 computers node in 3 different rooms. They could also hack 2 couple of turret in different rooms.
Each time they leave a room, the deadly robot IA respawn. They could also be attacked by hackers who jack from other computers.
In the real world, you only have 3 party members left.
Other two are in the Matrix, but their real world body could still be attacked. If they are too much injuried they are disconnected from the matrix. So you must defend them.
You also have to defend a central computer node and two secondary nodes.
The ennemies wave come endlessly as long as the timer isn't finished.
There are big deadly mini boss robots that try to attack the central node. If they reach it, they destroy it in no time.
There are groups of humans that try to hack the two secondaty nodes that are in other rooms. Some have paralysing grenade that make your party member lose all his action points. (he can't do anything for a turn or two).
If they manage to hack secondary node, your hackers in the matrix must re-hack them. (with robot ia respawning each time they leave a matrix room)
There are also turrets that can help you in the real world, but you need to hack them in the matrix. Only one couple could be enabled at a time, and those couples are in differents rooms in the matrix. (with the respawning stuff)
Considering your party members are scattered and the ennemies are as strong, if not stronger than you, you need one hell of coordination to win this one.
PS: Actually the second hacker is only in the matrix but for the sake of explaining, it would be more simple not mentioning it.