As promised, here is a list of all pinball games that were at Pin-A-Go-Go 2013 (to my knowledge)!

I counted roughly 260 games, on Saturday night.
This was near the peak of the population, and all spaces I could see were filled (except for only 2 obvious gaps).
As always, some games come and go during the show, so add a few to account for that.

WOZ
Whoa Nellie
Star Gazer
BSD
Vector
Fireball II
Mars GOW
Time Line
X-Files
Dr Dude
SWT
Vector
TOTAN
Whitewater *
LaserCue
HS
TOM
AFM
STTNG
Monte Carlo
Defender
Black Pyramid
Time Fantasy
Centaur
LAH
Maverick
Batman (DE)
Whirlwind
Mars GOW
Monopoly
WWFRR
TZ
Playboy (Bally)
Bushido (Inder)
Spooky (Zacc)
Hot Wheels (Zacc)
F1 Grand Prix (Bell)
Jolly Park (Spinball)
Verne's World (Spinball)
WOF
AFM *
BK2K
Flash
Transporter
Tron (Pro)
STTNG
Time Machine (DE)
ACDC (Premium)
EATPM
MB *
HS
AFM *
TAF *
MM *
STTNG *
Whitewater *
TZ **

Stars
Teacher's Pet
Harlem Globetrotters
Blackout
Pharaoh
Banzai Run
Godzilla
POTC
Punchy The Clown
Safecracker
Star Wars (DE) ***
Dr Dude
DH
Whitewater *
Bounty Hunter
Paragon
Cactus Jack's
ES
Frankenstein
Avatar
Big Guns
Viper (Stern)
TMBOP
Bow & Arrow
T2
ID4
Taxi
Diner
TOM
Batman Forever
FH
HD (Stern)
Metallica (Pro)
Tron (Pro)
Andromeda
Sorcerer
Star Trek 25th
POTC
BK2K
CFTBL
Flintstones
Pinbot
Cleopatra (SS)
Road Kings
Galaxy
Flash Gordon
Count Down (SS)
Scared Stiff
POTO
Playboy (Bally)
Gorgar
Robocop
Firepower
JD **
DW
FH
Black Rose
Medusa
Magic
Embryon
TriZone
Whirlwind
Simpsons (DE)
JP

Bowling Queen
Freddy
ACDC (Pro)
SMBMW
FT

Hayburners
Sittin Pretty
Rocketship
Universe
Cross Country
Palooka
Sweet Hearts
Kings & Queens
Cross Town
Bowling Queen
El Dorado
Ice Revue
Centigrade 37
Foto-Finish
Subway

Big Game (Rockola) (PM)
Fleet (PM)
Merry Go Round (PM)
Baseball
Cowpoke
Sunshine
Old Chicago
Jungle Queen
Lawman
Volley

Counter Attack (head to head)
North Star
Atlantis (Gottlieb)
Kicker (Chicago Coin)
Batter Up
Pro-Football
Play Ball
Space Mission
Wizard
Honey
Dealer's Choice
Beat Time
Tide Pool (customized conversion)
Ding Dong
A-Go-Go
Old Chicago
Grand Prix
Fireball
Star-Jet
Out Of Sight
Jumping Jack
Magnotron
Target Alpha
Paradise
Hula Hula
Yukon

Volley
Avengers (Green)
JM
Time Machine (DE)
Transformers (Decepticons)
Cyclone
Centaur
ACDC (BIB)
ES

Ticket Tac Toe
Quicksilver
DM
Pool Sharks
HS2
Devil's Dare
Panthera
Fireball Classic
Kings Of Steel
Cybernaut
Barracora
Flight 2000
Shadow
AFM
IJ (Williams)
BK2K
BK2K
F-14 Tomcat

Rollergames
Hollywood Heat
R&B&F
G&R
Raven
Jackbot **
TOM **
TFTC
SWT
SMBMW
Black Rose
Junkyard **
RCT
Frankenstein
Fire
Deadly Weapon
MNF
LW3

Mousin Around
Flipper FOotball
Gold Wings
Class Of 1812
SF2
Popeye **
Star Trek (Bally)
TSPP
Whitewater
WWFRR
JP
LOTR
STTNG
ACDC (Premium)
Transformers (Combo)
MB
Champion Pub
Swords Of Fury
Whitewater *
Fireball II

Cactus Canyon Continued ***
TMNT
Hyperpin (video emulation) ***
Sopranos
JM
Lost In Space
Big Guns
No Fear
Rollergames
Time Machine (DE)
CFTBL
TZ
Simpsons (DE)
SMB
MM
FH

Sky Kings
The Entertainer (cocktail)
3-Ring Circus (PM)

honorable mention non-pinball video game: Fix-It Felix Jr

* = Game has ColorDMD installed and is colorized

** = Game has ColorDMD installed and is a new shade of color (still monochrome) but with a clever new smoothing effect which visually enhances the resolution of the game and takes away the gap between dots on the display

*** = Game has aftermarket ROM adding new features

Josh

Nice! Was close. Since there was an official count, was there also an official list? Would be informative to see what games I missed counting.