Loner is a 3D game which has been created using A5 game engine. The programming language of the A5 game engine is C-Script. C-Script is a very simplified version of the professional programming language C++ - similar to JavaScript, the language for web pages. The main two tools in A5 game engine are WED (World Editor) and MED (Model Editor). By using WED, the game programmer can create the playing environment of game and by MED, the models used in the game can be created or edited. The script files of game are stored in form of .WDL and the models are stored in form of .WDL.

Loner, the game, is all about the anti-terrorism. The story of this game goes like this. Spawn, the hero of this game, is the under cover government agent and hates terrorism. A gang of terrorist have attacked a multiplex complex and got control of the building. The terrorists are using a computer center which is operating in the same building to hack into an international bank and also tries to loot all the money from the building. As the building is surrounded with police and well guarded by terrorist, our hero has to find his own way into the building and takes control over the building.