I remember coming out of Mechwarrior 2 and wanting something similar yet was its own thing.
In came Earthsiege 2, included as a CD in a magazine and boy do I remember it fondly!
The lore itself, while seemingly basic, grabbed me and the briefings with General Gerling as FMVs, much like the Command & Conquer series,helped me immerse in this struggle against the Cybrids.
Failure during the campaign doesn't always lead to a game over but it will generally cut you off from acquiring a new piece of technology, whether it's a new weapon or a herc (how the robots are called here).
Dual plasma cannons on the Razor is so OP though!