Great ideas like the lost squad of Legionnaires corrupted by the Aberrants, who now appear out of nowhere to fight for their old Order. Part of this is the way the game is played. While the games are smaller than many wargamers may expect, with 10-15 pieces to a side, they can be scaled upward with little problems, I imagine. The heroic feel of the setting is captured in the size of the game. High points of the game consist of it's Action Point system, which worked well during the game.
Squads can accomplish more than just shooting once, or running, in a phase.
Also notable are the well-fleshed out campaign rules, which can show how a squad of grunts survives through this long conflict. Highly appreciated are the rules covering picking up equipment, how much a character can carry, and a half-dozen other things that have popped up in other wargames but have never been dealt with. The rules also cover converting your RPG character into a combatant. The miniatures that come with the game are superb and of much higher quality than the plastic figures for other systems, on par with metal minis. While there is a significant amount of flash to them, this is trimmed easily and the figures seem sturdy.