Final Liberation was an epic scaled PC game that was slated to be huge, but lost support almost immediately after release. Only Ork and Imperial forces, those initially released with the game, were ever actually released.
The game pitted huge forces consisting of infantry, vehicles, titans, and super-heavies against one another on various terrain maps to include entire imperial cities to large industrial wastes and desert scrub lands. The graphics were pretty cool for the time, but were blocky all the same.
My copy no longer works on my WinXP system, so it has been quite a while since I enjoyed it. I'd sell every other GW game (Dawn of War included) before I'd part with it, though. Final Liberation is my fave all-time GW PC game.