A Progressive outfit, initially formed as a solo project in 1992 by FIRE &ICE vocalist Pär Wennerström, HORIZON also included SPIRIT guitarists Jens Andersson and Stefan Engström, keyboard player Patrik Björk and drummer Rickard Roskvist.

A later HORIZON line-up included ex-GIVEN FORM keyboard player Björn Nilsson and former HELLMARK drummer Micke Levenstad.