Fortnite might make a good weekend game at some point

Still in early access but supposedly pretty solid and from Epic mega games who sort of know how to make multiplayer games
A 4 player coop game of two halves part one in the day you scavenge materials and build a fort make weapons and traps then part 2 night comes and you repel a horde style attack filled with monsters.
It has four different classes that have different play styles
so minecraft crossed with L4D running in unreal 4 and featuring overwatch style loot boxes