Model and textures for the weapon still remain in Grand Theft Auto III's game files (mine.dff and mine.txd). The same files can also be found in Grand Theft Auto: Vice City's game files, suggesting that the weapon was dropped again. A functional version of the weapon can be obtained with a cheat device in Grand Theft Auto: Vice City Stories. It works like a bomb and will only go off when touched by a pedestrian or vehicle.
Although the weapon didn't feature in Grand Theft Auto: San Andreas or in its game files, the radio station inside Ammu-Nation stores advertises land mines.
A Landmine's Texture of PS2 Version in GTA Vice City Stories
The HUD Icon of Grand Theft Auto: Vice City Stories