Unreal Engine

Background
Unreal Engine is a game engine developed by Epic Games, originally created for the 1998 PC first-person shooter game, Unreal. It has since become a popular tool used by many game developers today. The animated logo was first presented for the release of Unreal Engine 3.

1st Logo (2005-2011)
Visuals: The logo starts on a very complicated rectangular space, where several transparent details join and create the box with the Unreal logo inside. The name is written on the lower section of the box, with "TECHNOLOGY" below that and "POWERED BY" appears above the box. Golden sparks emerge from the box and run over the background, then return back.

Variant: A still logo exists. They use either a black or white background.

Technique: CGI.

Audio: A technical composition of whooshing and electronic clanks, with two notable hissing sounds when the electronic sparks leave the box and return. None for the still logo.

Availability: First used on a demo presentation of RoboHordes, later renamed RoboBlitz, and was seen on a lot of games.

2nd Logo (2010-)
Visuals: The logo starts on a black background, when the giant bright U letter comes and zooms into concentrical circles, which zoom out and beyond. The letter is joined by the usual white circle, which turns. The words appear to be the same, but without the box. When it finishes, the logo shows some noise and vanishes.

Variants:
 * On Kinect Adventures, the logo is stitched on fabric.
 * As of 2013, the blades of the circle are removed and "ENGINE" replaces "TECHNOLOGY".

Technique: CGI.

Audio: A single technical whoosh. None for the still logo.

Availability: Seen on Bulletstorm. The still logo can be seen on Spyro: Reignited Trilogy, among other titles.