Me and my buddies decided to field an apocalypse battle, my
IG were paired up with Orks, Black Templar, and Daemonhunters; each with 2,500 points against one 10,000pt Dark Angels force. The Dark Angels player was the only one there with the ability to readily field a force over 3,000pts.
I kept my guard mostly in reserve, allowing only one basilisk, two sentinels, and my ten man ratling squad to deploy. Orks were only infantry with two trukks, the daemonhunters deployed one land raider and his whole infantry, and the Black templar fielded two predators, a land raider and all of his infantry. The Dark Angels player deployed 4 land raiders, 2 predators, 5 terminator squads with 5 men each, 2 or three rhinos, and the rest was filled with heroes and infantry.
I infiltrated my ratlings into 3+ cover, which then received +1 to their cover save for being small. During turn one, the Dark angels player wasted 2 predator shots, all of his terminator shots and 3 tactical squads in an attempt to shoot my ratlings out of cover. They killed about 4 and I chose to have them pinned. The land raiders took shots at the ratlings and did nothing else to the squad. He then assaulted them with a termy squad to finish them off. My basilisk shook a land raider, while the orks advancd with the black templar. One trukk rammed a rhino and took off its turret while suffering an immobilizing hit. The dark angel player had to use the restroom and my teammatesdecided to go to the nearby 7-11 for food. This took 30 minutes.
In turn two the Dark angels player advanced forward and took pot shots at the orks and black templar, reducing the orks by 5 boys and the black templar by 1 man. He also finished off the trukk and sent it into the ramshackle rule(which made it careen into a squad of Dark Angel tactical marines).This was the most amuzing part of the game.
I deployed my baneblade, another basilisk, a chimera holding yarrick and a stromtrooper squad, and 3 infantry squads, each holding a lascannon. My baneblade fired at the land raiders, but was off by an inch so no shot was fired. The orks shot at the terminators killing two total and the black templar proved useless. My basilisk took out 6 space marines(4 from one 10 man squad and 2 from another 10 man squad). We ordered a pizza and ate said pizzas which took almost an hour.
Turn 3 saw an orbital strike on my baneblade that took out one structure point and reduced its movement to 3 inches. The eradication of an ork mob and the destruction of a ten man Black Templar Squad.My basilisk scattered and took out two bikers. While my baneblade moved up 3 inches and fired at a land raider, the shot scattered and landed on top of another land raider, destroying it. The orks fired back and the daemonhunter grey knight terminators moved to attack the Dark Angel terinators. The Black templars took out 1 1/2 terminator squads. I failed ALL of my reserves rolls.
The game was then ended as it was 12:00 in the morning and we had started at 12:30 in the afternoon. We declared it a draw as I had 5 more squads in reserves with a Leman Russ and the Dark Angels player had taken heavy hits.

So all in all, if you want to play an apocalypse battle, don't fudge around and plan to spend close to 12 hours playing.