Incorrect file associations could be the result of underlying issues within your PC system. As such it is highly recommended to scan your PC for invalid registry entries, unused processes and other unfavourable system settings to identify slowdown issues.
The EGG file type is primarily associated with 'Ducks' by Hungry Software.
Ducks brings together puzzle, arcade and platform games in one feathery package.
EGG files can contain levels animations, objects, sounds, backgrounds, texts and music.