Sega Swirl 1.06

The first 6 versions of Garry’s Mod which were free. Originally uploaded by FoobyZeeky on Facepunch fourms.

Original source: MediaFire
 
This is the full installer for America's Army v2.8.3. Although it is the latest full installer available, further patching is required to update the game to the latest version (all required patches and instructions are available on America's Army wiki page).
 
Note that official support for the game has been dropped. The main authentication server is no longer available, rendering online multiplayer and training missions unusable.
 
For continued support, it is recommended to use a community-maintained client like Assist (http://aao25.com/getting-started/).

Original source: FilePlanet
 
This is the Rainbow Six: Vegas Map Pack. It includes all the content from the Xbox 360/Playstation 3 DLCs ("Player's Pack Red Edition" and "Player's Pack Black Edition").
 
Here is the list of maps added:
 
Content from "Player's Pack Red Edition"
Doscala Restaurant
Marshalling Yard
Roof
Killhouse: Redux
Border Town: Redux

Content from "Player's Pack Black Edition"
Red Lotus
Wartown
Neon Graveyard
Streets: Redux
Presidio

This is the individual PAK file for the shareware version of Quake. It is the latest version available.
 
This file was taken from a fresh install of the Quake shareware release.
 
The shareware come with the first episode "Dimension of the Doomed".
 
Note that this file is meant to be used with a source port of the game. How to install the file will vary depending on the source port.
 
Details (and a download link of the original shareware release) can be found on the Quake wiki page.