UT3 is incredibly intuitive to control. Secondary to the feel is the particular recipe of features that make up this third Unreal iteration. The game modes are each classical (if they can be so-called) and instantly comprehensible.
Deathmatch comes with a bunch of exquisite maps, each one delivering the tenets of the old game perfectly: the maps are always circular so that fleeing and chasing never truly lands us at dead ends, while the distribution of items over the environment has been carefully studied. No spawn lands you too far from a decent weapon, and no powerful power-up is placed anywhere that isn't dangerous to get to. This consistency wobbles a bit in the other maps, but generally it's entirely well judged and playtested to the smoothest of rides.