Valhalla MTA Roleplay
Valhalla Gaming MTA Role Play is a role play gaming server using the Multi Theft Auto multiplayer modification for Grand Theft Auto: San Andreas. Originally started in January of 2008 as MTA:RP the server has grown to 110,000+ lines of code.
The Valhalla Gaming MTA Role Play server boasts some of the most innovative and ground breaking features ever seen on a GTA role play server. It is this pioneering that has seen the server reach the success it has today as the most popular MTA server around and one of the most successful RP servers on any Grand Theft Auto multiplayer modification.
Multi Theft Auto
"Multi Theft Auto (MTA) is an open-source software project that adds full on-line gaming support to Rockstar North's Grand Theft Auto: San Andreas PC game, in which this functionality is not originally found. It is the first open-source modification that adds a highly customizable network play element to a commercial closed-source single-player PC game.
Developed as an experimental piece of software for earlier Grand Theft Auto series, Multi Theft Auto has become an advanced multiplayer platform for gamers and developers. The software provides on-line gaming for dozens of players running user-generated gameplay content and scripts through a Lua virtual machine, and is freely distributed under the GPLv3 license."