Doom to Dunia: A Visual History of 3D Game Engines
Torque
A fully 3D graphics engine, Torque was first created to power the first person shooter Tribes 2. One of the highlights of the Torque engine was that it featured an in-game terrain engine capable of manipulating levels of details on the fly so that fewer polygons would need to be rendered.
Torque also became known for its built-in world editor complete with drag-and-drop GUI creation. Combined with flexible multi-player network code, Torque was a fairly robust game engine despite lacking a laundry list of titles.
Date Released: 2001
Notable Games: Penny Arcade Adventures, Tribes 2, Wildlife Tycoon
Serious
Several years in the making, one of Croteam's main goals in developing the Serious engine was to allow for large spaces and large numbers of on-screen characters at any given time. By doing so, Serious Sam became an adrenaline pumped arcade style first-person shooter with near non-stop action.
The Serious engine came as two parts: Serious Editor and Serious Modeler. Game models consisted of 3D files importanted from standard 3D object editors like Lightwave or 3D Studio, whereas the Serious Editor was tasked with creating the world and populating it with characters.
The original Serious engine didn't support pixel or vertex shaders, but those and more would later be added in subsequent revisions.
Release Date: 2001
Notable Games: Serious Sam (entire series)
Max-FX
While Max Payne wasn't released until 2001, Remedy Entertainment had been working on the game's Max-FX engine since 1997. It was developed from the ground up as a hardware-only 3D rendering engine optimized for DirectX 7.0.
Max Payne was best known dazzling gamers with its use of bullet-time, which slowed down game play, a trick made famous in the move The Matrix.
In addition to powering Max Payne, Futuremark implemented the Max-FX engine in its 3DMark99, 3DMark2000, and 3DMark2001 benchmarking suites.
Date Released: 2001
Notable Games: 3DMark (99-2001), Max Payne
Unreal 2
Whereas the original Unreal engine burst onto the scene with the game it was named after, the Unreal 2 engine first appeared in America's Army. More than just a minor update, Unreal 2 is a highly modified version of the first engine, with the overhauled code adding integrated physics and 64-bit support. It also introduced improved special effects, like true moving water, and is said to be able to handle 10x more polygons.
Date Released: 2002
Notable Games: America's Army, Brothers in Amrs, Deus Ex: Invisible War, Lineage II, Magic: The Gathering - Battlegrounds, Postal 2, Thief: Deadly Shadows, Tom Clancy's Rainbow Six 3, Splinter Cell, Ghost Recon 2, and Ghost Recon Advanced Warfighter, Tribes: Vengeance, Unreal II: The Awakening, Unreal Tournament 2003 and 2004, XIII