Imagine a mod featuring massive Warhammer 40,000 battles where all 9 races in Soulstorm (and more!) have a chance at epic victory. A mod where there's no shortage of all new units, buildings, abilities, and even titans! A mod where there's nearly no limits holding you back. It's all about all out, massive war. Wanna nuke your enemies? You can. Gloriously epic titan duels are your thing? Ultimate Apocalypse has you covered.
It is a very good mod.
But it pushes the system requirements way higher than what the base game needed for "the best experience". Also the AI seems to receive more resources from nowhere than in the base game; and even the Easy AI techs up faster than it is possible for a player against certain races (with only the minimum win conditions).