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

Caster's route (direct download)

By GustrbGustrb

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