Products of Jaakko Kernen
The Doomsday Engine is an enhanced Doom port. The project has been alive since 1999 and nearly 10 years after there are still updates coming. We all know Doom is one of the greatest games ever made, due to its innovation but also to the level design and the sheer amount of fun it includes. However the original Doom is nearly 16 years old. So it has.
Freeware download of Doomsday Engine 1.9-.9, size