Beta Weapons are weapons that were removed from a GTA game during its development. It also includes some weapons that didn't make it to the final game and weapons have their models changed, and some still exist in the game files. Many made well during development and it is unknown why they were removed. However, most of them can be obtained through cheat device and trainers.
Grand Theft Auto 2
GTA Vice City
GTA San Andreas
The Skateboard was cut from the PC version. It is primarily a melee weapon but also a vehicle. Available as a mod for the PC version but is not usable on the PS2 version.
The Micro SMG known from GTA VC was also removed, but can be seen in several early screenshots.
The PSG-1, MP5-K, M16, M-60, M249, M47 Dragon, M82 and Nail Bat were cut. Models of the weapons can be found in the game files but lack textures.
The Micro-SMG was originally more detailed.
The Revolver was cut.
The MAC-10 was meant to reappear but was cut instead.
The Barrel was cut from the main game.
GTA Liberty City Stories
GTA Vice City Stories
The tear gas and landmines were going to be included in the game. However, they can be obtained with cheatdevice.
The phone was cut and replaced with a pager. In the PSP version, it's possible to take the phone out with cheat devices, but it's useless. But can be seen only in cutscenes.
The Advanced Rifle was more correctly modeled after a CTAR-21.
As seen in some artwork, the M4 was originally going to make an appearance, possibly the original Carbine Rifle, but instead was cut and replaced by the current model.
A Glock 17 can be seen in some artwork, usually wielded by Franklin, maybe the original Pistol design, but was replaced by a PT92 instead.
The beta parachute in GTA V, with the color schemes from TBOGT.
The Parachute had the same color sheme from The Ballad Of Gay Tony.
In "The Trunk" artwork, Michael can be seen wielding an M1911. Possibly the original Combat Pistol.
A SIG Sauer P226 can be seen.
Inside the data files are the weapon stats for a Fire Extinguisher, a Wrench, a Shovel, and an Assault Sniper.
In the trailer, Trevor can be seen holding an assault rifle with a laser attachment, the assault rifle made it in the final game, but the laser didn't, possibly due to the fact that it is useless and is not required since the player can use the HUD instead.
The wrench (as seen in the mission By The Book) - HUD Icon
The Fire Axe - HUD Icon
The rope - HUD Icon
A SCAR-like assault rifle - HUD Icon
A M14 sniper rifle
A XM25 airburst grenade launcher
Some weapons had the green tint by default
Some weapons had an older more realistic wood-cast model.
An M9 Pistol was meant to appear.
One of the pistols (not confirmed which one) had the same shooting noise as the pistol from GTA IV, as Lamar is seen shooting one out of a car in Franklin's trailer.
The Rocket Launcher originally had an optional grip attachment, as seen in the official BradyGames Guide.