Dead Rising 2: Off The Record

This achievement requires you to not consume meat, dairy, and alcohol just like the description says. This can be slightly painful, because the game seems to count other items as these three categories that you wouldn't necessarily think are classified as such (such as snacks... they must have meat in them!) Some people have said having survivors eat said items also can glitch the achievement. So if you are planning on saving Snowflake in this same run be sure to use the 2nd method (rather than feeding him steaks) and kill Lenny, then wait until 2pm on Day 1 and head back and find Snowflake auto-tamed. Also be sure not to give survivors alcohol to get the "Survivor drunk achievement".

The EASY way:

If you don't mind asking someone for help (like myself), you can ask someone who has a save created right before the military arrives and join their game, spend 5 minutes and get Alpha & Omega AND Purewal Memorial Cup knocked out easy peasy.

Makes playing the campaign a lot more fun when you can eat or drink whatever you feel like!

OTHERWISE

The HARD way:

Only drinking ORANGE JUICE seems to be the sure fire bet to not glitching the achievement and there are plenty of locations for it, including the newspapers stand outside of the safe room in Royal Flush Plaza and Roy's Mart in Royal Flush Plaza. Simply always have a stock on hand so that you get forced to use non-orange juice health items in boss fights. Be sure to have at least a couple before each boss fight. Never carry any other food items so that you don't accidentally use them in a panic. Grab the magazines for health boosts. One in the Ragazines shop in Palisades Mall and one in the Newspaper Stand in Royal Flush Plaza outside of the safehouse. Once you've made it through the whole story without failing any of the Case files and you end up on the Royal Flush Plaza rooftop when the military arrives, the achievement will unlock.

Okay, this should be nothing more complicated than stocking up on the OJ supply repeatedly as needed at Roy's Mart in the Royal Flush Plaza and completing cases until the military arrives while you are waiting on the rooftop of the Royal Flush Plaza on the third day. Sports Fan costume and magazines can increase the amount of health you get off of a single OJ. Watching movies in the theater is great for skipping 1.5 in-game hours if this is the only thing you are trying to do in that play-through.

Now the kicker: I can confirm this is just as glitchy as it was in the original version. I had it glitch on me (despite an ultra strict diet of OJ), but I think I figured out why my last run was successful. I believe your file has to be a true new game and not a manual restart of your previous story play-through. This doesn't mean you can't use the file with your upgraded Frank and have to start a brand new file, it means that your previous story play-through on that file needs to have been concluded, where you got the credits to roll and received whatever ending you were supposed to get, instead of just manually restarting the story from the main menu with a partial story play-through in progress. I played loads of Sandbox, so I don't believe this was a factor at all. This was the one major difference I noted from my previous attempts and my successful run.

Hope this saves people some trouble with this achievement!

Complete copy of CrazyDoginOZ's Guide on the 360 version.

For this achievement OJ will be your best friend, I also recomend grabbing the magazine from Stans Large Print Bookstore in Palisades mall that gives u plus 50% on all consumable items, or health book 2 found on top of a refridgerator in Hungry Joes pizzeria in the food court, that gives 100% on consumables.(thanks for the reminder timerider42)
***THIS IS BEST DONE SOLO, dont join anyones game or except any invites to your game, it is best to set ur game type to private to avoid any issues, dont even touch sandbox mode till your done with this cheeve. (thx to Robster80 for his tips).

*Avoid any alcohol, this includes cocktails,wine,vodka etc, but mixing 2 alcoholic drinks into a blender to get a juice will not affect this cheeve.
*Avoid any dairy, milk,cheese, ice creams,cookies, coffee creamers etc,if your not sure,best advice is leave it.
*Avoid meat,steaks,ribs etc, to be safe avoid anything that may contain meat, like pizzas and hamburgers etc.
This still leaves alot of items to consume snacks and fruit etc, but as i mentioned before OJ is ur best bet, or mixing juices in blenders.
One bit to watch is the fight with the twins in Shoal Nightclub (Located in the Yucatan casino), make sure to take at least 3 OJ's or juices,as u are locked in the room with them and the only consumables r alcoholic except for a pinnapple which is only good for 2-3 squares of health,and some jelly beans worth 1-2 squares of health.
As soon as the millitary arrives the cheeve will pop.
OJ's can be found in the pharmacy in Royal Flush Plaza, in the back room, Another good spot is Chris' Fine Foods upstairs in Palisades Mall.
Keep an eye out for blenders in kitchens, hard to notice if u dont know what ur looking for, they are found all thruout the game,
** If u eat or drink something wrong or your not sure about, restart from a checkpoint or save and ur still safe for the achievement **
**Blender locations**
Americana Casino - Shots & Awe
Platinum Strip - Juggz Bar and Grill
Food Court - Rojo Diablo mexican restauraunt
Atlantic Casino - Sipparellos
Silver Strip - Pub O' Gold
Yucatan Casino - Barron von Brathus
Palisades Mall - Grotto Bar (1st floor)
Slot Ranch Casino - the bar
Uranus Zone - Bottom bar of the lounge area, directly left as you enter through the alien head entry