3k+ 1k game, 4 players per team.

Played a 3k + 1k game of 40k today, 4 players per side. i.e. 16000 points per side.

The set up was 2 tables:

TL;DR:
Massive game, good fun but ridiculously hectic. Stomp is OP. D weapons are necessary with super heavies and gargantuans. The dice were definitely not my friend today.

1 underground table: unit restrictions like no flyers, large blasts set of cave ins etc.
1 overground table: Length of 3 standard tables,
The defenders (3 chaos) deployed in the centre with loads of ruins., the eldar and guard set up behind a wall that blocked us off from the centre section with an 18" high wall with a 12" wide gate in the middle.
On the underground table, necron set up at one end opposite chaos marines at the other.

Effectively that was the beginning of the end for us.

The Ork player had a looooong run into massive fire including a (counts as) warhound, which blitzed his stompa first turn (4 D-shots make it go bye-bye)

Myself and the guard player trapped behind the wall. In hindsight we should have taken the wall down. Put us in a choke point. Negated my mobility, and the Guard player had to run the length of our table. On the underground board we did better, but no transports made for a long slog.

Effectively we were too spread out and got defeated in detail. If the Eldar and Guard had swapped deployment with the Orks, we would have had a much better beginning position, I would have had better mobility and the Guard player would have had more targets to shoot at.

Helldrakes are ridiculously difficult to kill.....Except for dark reaper exarchs with icarus lascannons.
What was really difficult was when daemonettes got a 2+ invuln save. absorbed an absolutely staggering amount of fire. 2+ Invuln Save was created by a couple of Daemons and daemon princes and the warp storm table, a mixture of abilities and psychic powers

Centre of Above ground table. Wall is just out of shot to left.

From centre of table looking at wall. Wraithknight went through and did about 600 points damage in a turn and a half. Stomp is OP. got taken out by a 666 point daemon prince. We had lowered his I due to Slaanesh Musk, but turns out that fearless are immune. possibly could have done more damage. It's important in my opinion to tell opponents not only what a rule does but what the exceptions are. 

Underground table. All players had a 1000pt tunnel rat army. Which got deployed from reserves onto this board. Got pretty messy, loads of carnage. Gazgkul Thraka Formation Survived for 4 turns and did the most damage on this table. Karandras, killed the necron lord, but then got killed in retaliation strikes. To be fair he was annhialated thanks to my abysmal rolling.

Length of table. Big Pink Slaaneshi Warhound in foreground. Almost single handedly tabled the Ork Player. Titans need to be FOCUSSED down fast.

We dubbed this the flying circus. 2 Valkyries, total of 5 Heldrakes (not all in shot). They Vector striked on the Valkyries to kill them. right hand side was eldar deployment. Guard deployed on left. 

The red and black terrain feature was a generator (AV14 4hp) when it was destroyed, created Apocalyptic large blast and created a crater in the overground map which took out a bunch of necrons.

The unit at the bottom of the shot never moved, shot, assaulted...anything. Thats how out matched we ended up being, the other team had units literally to spare!  :)

Good game, almost stupidly hectic. Trying to keep track of two armies on two different tables waas very difficult. There was an ability to move units between the above ground and the underground, but the unit had to embark then disembark on the next turn so it wasn't really used and had no real bearing on the game.

I can post the lists if anyone really wants to see them.