The Neverhood is a point and click adventure game made by Doug TenNapel and released for PC by DreamWorks Studios in 1996.
Two years later a 2d platform game called Skullmonkey, which it was intended as a sequel of the first game, was created by the same developers for PSX. It was a commercial failure, and so the IP was quickly forgotten by the producer.
However in 2012 sketches probably intended for a new game in the series appeared in a Neverhood fan forum. You can see those concept arts in the gallery below.