For keeping track of your progress towards 100% completion. (external link)

By Lighnat0rLighnat0r

Tool that lets you play in windowed mode (external link)

By ghotik

Supports GTA III / VC / SA. (direct download)

By EarleysEarleys

A program which allows you to easily save anywhere. (external link)

By Lighnat0rLighnat0r

Spawn right next to the hospital (direct download)

By Kamiks0320Kamiks0320

Hundo saves for CasterTM's route. No hidden packages, no stunt jumps, no rampages, no cars delivered, no vigilante kills, and no dead submissions for possible rerouting/testing purposes. Bridge and weather cycles have been accounted for. Additional health has also been added to cop cars that normally would've been done with Vigilante. (direct download)

By antianti, guywithguywith

Any% saves. A few missions are skipped since they were either chained for an IP/dupe or were not significant enough to warrant its own save. (external link)

By guywithguywith

Spawn right next to the marker; Glitched Dodo outside ready to go (direct download)

By iguanaiguana

Spawn right next to the marker; Glitched Dodo outside ready to go (direct download)

By iguanaiguana

Spawn right next to the marker; Glitched Dodo next to the fence ready to go (direct download)

By iguanaiguana

(direct download)

By Mopsi

any% Route with Mission Icons (direct download)

By EidgodEidgod

High resolution icons from mission givers etc as used in the 100% checklist. (external link)

By Lighnat0rLighnat0r

Updates GTA III to v1.1. Fixes a few annoying bugs (direct download)

By Rockstar Games

For "Cannot find 640x480 video mode" problem, download and put it in \Documents\GTA3 User Files (direct download)

By Rockstar Games

https://drive.google.com/file/d/19N9F5q6c17NmUKq4P8DLTCKfAnklj75K/view (external link)

In case you deleted the default skins for some reason (direct download)

By Rockstar Games