Now, you may need to be some kind of techno pagan to truly understand this. But it appears that buried deep in the code of  Max Payne 3 is the vehicle list for Grand Theft Auto V.

This is not the first time Rockstar embed information on other games inside, um, other games. The same happened for Red Dead Redemption and Bully.

This is by no means concrete evidence, but given the past habits of Rockstar, this could very well be, at least some of the transportation devices we’ll be ripping up San Andreas in. Below is the list. Below that is the code. At least I think it is

Cars

apc
bobsleigh
benson
biff
bobcat
boxville
buccaneer
burrito
brzbus
casco
cadge
car_brzhatchplc
car_brzsedanplc
car_brzhatchjnk
car_brzsedanjnk
carga
cavalcade
cognoscenti
cs2000
chavos
dukes
dune
feroci
forklift
futo
furzen
fxt
gant
hauler
minivan
infernus
patriot
phantom
prairie
police
rancher
rhino
schafter
seinove
skimobile
taxi
vanpony
willard
winky
trash
railmu
flatty
snowplough

Bikes

enduro
jz125
z75
faggio2
spike

Helicopters

autogiro
bchopper
annihilator
bentham
maverick
hind
napalm
scamp
heli_vcpf
heli_tfe

Planes

cuban800

Boats

squalo
bassboy
chika
fisher
fishboat_a
fishboat_b
fishboat_c
fishboat_d,
marquis
reefer
tropic
gunboat
sabs_boat
small_gb2
dinghy
p_mi_botfsh
whaler
woody
woody2
sporto
tinny
tug
contbo
smug
edsboat

Trains

cablecar
chairlift
subway_lo
subway_hi
train_carg
trainf_carg
trainr_carg
train_int
lighty

Thanks NeoGaf