More informationer there not was enougth space in the other group to be in so here you got it.

Creatures: http://fallout.wikia.com/wiki/Fallout:_New_Vegas_creatures

Humanoid:

Ghouls
Humans
Super mutants

Non-humanoid:

Big Horner

Reptiles:

Geckoes
Little Gecko
Golden Gecko
Fire Gecko
Deathclaws

Insects & Arachnids:

Radscorpions


Characters: http://fallout.wikia.com/wiki/Fallout:_New_Vegas_characters

Charaters from Goodspring:

Dr. Mitchell
Easy Pete
Sunny Smiles
Mayor Trudi
Chet
Joe Cobb
Ringo
Victor
Cheyenne

Characters from Black mountain:

Tabitha
Raul
Nightkin soldiers
Neil

Characters from Helios One:

Helios One

Unknown:

Craig Boone


Companions: http://fallout.wikia.com/wiki/Fallout:_New_Vegas_followers

Permanent followers:

Raul, a ghoul held hostage at Black Mountain.
Craig Boone, an ex-NCR Sniper.

Temporary followers:

Sunny Smiles
Trudi


Factions: http://fallout.wikia.com/wiki/Fallout:_New_Vegas_factions

New California Republic
New California Rangers
Caesar's Legion
Powder Gangs
Crimson Caravan
Brotherhood of Steel
State of Utolbitha
Nightkin
Gun Runners
Followers of the Apocalypse

Fallot New Vegas places: http://fallout.wikia.com/wiki/Fallout:_New_Vegas_places

Places:

Black Mountain
Fremont
Goodsprings
Goodsprings General Store
Prospector Saloon
Helios One
Hoover Dam
New Vegas
Lucky 38
Dinky the Dinosaur
Primm
Buffalo Bill's Casino and Hotel
Vault 21
Camp McCarran
Novac
Westside