1.UFO-TRUE
2.Ghost car-FALSE
3.Jaws-FALSE (there is a shark in san andreas but dosent kill people)
4.Mass grave-TRUE
5.Loch ness monster-FALSE
6.Ghost town figure-??? FALSE
7.Mothman-45%TRUE 55%FALSE
8.Ghost vortex-95%TRUE 5%FALSE
9.Suicidal photographers-TRUE
10.Shady Creek creature-FALSE
11.Weird horn-TRUE (go under gant bridge on san fierro during foggy weather and u will hear the horn)
12.Serial killer (trenchcoat guy)-TRUE (but doesnt kill people)
13.Blue hell-TRUE (just go to LS gym and kill everyone there and use jetpack cheat and fly up)
14.The Cult farm-TRUE (but there are no cultists in the farm just a weird blue light)
15.Epsilon cultists-TRUE (u can find them mostly near the airport highway)
16.Glowing grave-TRUE
17.Scott Wilson's grave-TRUE (go to the shady creek graveyard and u can see his name written in a grave)
18.Ghost grafitti-TRUE (only in LS graveyard)
19.Mount Chiliad ghost car-TRUE (its only misplaced peds driving on the east mount chillad)
20.Mt. Chiliad horror voices?-TRUE (if you modded your sounds in gta then its true if u didnt then its FALSE)
21.SPAZ guy-FALSE (no ped in the game holds a SPAZ only in special missions)
22.The cane-TRUE (its a weapon xD)
23.UFO map-TRUE (the map in lil probe inn is the locations where u can see lights in the sky moving and blinking but no ufo's)
24.Bigfoot?-FAKE (theres no bigfoot in the game but R* said there is a 2 legged creature in the woods)
25.Leatherface?-50%TRUE 50%FAKE (leatherface can be real if u stay too long in the panoptition without any homies with you
26.Pigsy?-FAKE
27.Cris Formage-TRUE (but never seen him)
28.The Truth-are you kidding me?!?!?!
29.CJ's Moms ghost-TRUE
30.The ring girl-FALSE (its only a misplaced ped)
31.Vice City maps-TRUE (beside cluckin bell in angel pine)
32.Open grave-TRUE (maybe thats leatherface's body and someone opened it)
33.TV on grave-TRUE
34.Cobra MARITAL arts-theres nothing to do with that
35.Bio waste well-TRUE (beside the sprunk factory in montogemetry)
36.Fort Carson tunnel-TRUE (but there are no clowns or anything there)
37.Phone booth?-FALSE (there are phone booths in san andreas but whats wrong with it?
38.Not welcome mat-TRUE (in smokes crack palace)
something i found in the game :
House Hell
Clowns Pocket Casino roof lights
myths unconfirmed :
Marvin Trill (he said he is in an underground bunker in the desert)
Zombies (the zombotech building in san fierro)
.....still finding more myths