On the subject of death and destruction, we should comment on the weapon choices of Requiem: Avenging Angel. They pretty much bore us to heck and back. Pistol, assault rifle, shotgun, grenade launcher, sniper rifle, rail gun, and rocket launcher. The models of the weapons are equally uninspired. No effort was put into the weaponry, and it shows.
The way that Requiem attempts to set itself apart from the pack, and partially succeeds, is in it's use of angelic powers to expand game play. You have a host of powers that fall into four categories: Offensive, Defensive, Maneuver, and Special. Offensive powers are more weapons to add spice to the recipe. There are only two offensive powers worth mentioning. "Blood boil," which, wonder of wonders, causes your opponent to bulge and contort in odd ways as their blood boils. And "to salt" which turns your opponent into a pillar of salt which then crumbles to the floor. The defensive powers and maneuver powers are not even worth mentioning individually. There are a few special powers of note. One lets you possess enemies for a short amount of time; the other lets you plant the suggestion in an enemy's mind that they want to kill all their friends and drink their blood.
The actual control of Malachi in combat is just fine. They did not mess up too badly here. But the method for selecting and using your various angelic powers is a damn pain. Because of this poor design, you'll find yourself rarely using more than one angelic power at a time in combat. It takes too long to switch between them.