After hearing about this game for years, I finally played a game of it last month. At my Chess tournaments, I bring some variants and other games, and I encourage others to do the same. Someone brought their Omega game, and we played it.
I wouldn't call it my favorite variant, but it was kind of cool. The champion piece is sort of a territory control piece. It can get to an awful lot of nearby squares. Placed somewhere in the center of the board, it dominates that area. That's something that Chess lacks.
It wasn't bad. I don't think it's destined to be a replacement for Chess, but it was a pleasant enough diversion.
Omega Chess - The game is played on a 10x10 board with an extra square in each
of the extreme corners where the wizards are placed at the start of the game.
The game is laid out like regular chess with the addition of a "champion"
in each corner and a "wizard" diagonally behind each champion.
http://omegachess.ru