I have always heard of it but does anybody know the list of 28 animals?

It was on here once before, i cant remember them all. It sure would be fun to go after all of them with a bow though.

I believe you are refering to what is more commonly known as the 'Super slam'. A "Grandslam' is the taking of all 4 species of N American wild sheep. The Super slam consists of taking one of all
4 Sheep species
all 5 caribou species
2 Elk species
Bison
5 Deer species
1 mountain lion
1 mountain goat
all 4 bear species
all 3 moose species
1 muskox
1 antelope

Some people have argued that Walrus should be added to this list.

I'm maybe a third of the way there!

I'll bet walrus taste nasty. Polar bear too!

First of all I'm not sure what the NA 29 is but isn't there 3 species of elk?
Rocky mt., roosevelt and tule??

Yea you're right Mark, there is at least 3 species of Elk including the Tule elk. I don't know why its not included in the Superslam. But there are several morespecies of whitetail deer, Bison, and even sheep.
I see that B&C even list Jaguar as a N American trophy as well as 2 species of walrus. I'm only guessing but I believe B&C drew the line somewhere, probably ruling that tule Elk, Jaguar etc are not included because of their scarcity and difficulty in being able to hunt them legally.

Thats pretty good! Which ones do you have? I've hunted 8 of them and have 7 of them. With the cost of sheep and polar bear I'm sure I'll never get them all but thats OK, I'm having fun hunting the ones I can.

I am 1/27th of the way there

I have a whitetail,mulie,elk,Alaska moose,antalope,black bear and a caribou. My next one I hope will be the montain goat, I have never used a guide befor but I'm going to have to .Any good advice on a cous deer or any other big game befor I start to hire guides. I have a pocket full of will and skill that has gotten me this far.Good luck to all.

In BC we can hunt,
Rocky Mtn elk Black bear Stone sheep
Rosy elk Grizzly bear Rocky Mtn bighorn
Canada moose couger Dall Sheep
Moutain Caribou wolf California Bighorn sheep
Mule deerwolverineMtn goat
Blacktaildeerbobcatbuffalo
sitka blacktail lynx
whitetaildeercoyotes turkey