Like most free online horror games, Requiem has an emphasis on action and combat. You'll find yourself taking cover in several battles against waves of enemies, engaging in hand-to-hand combat as well as using your ranged weapon skills to do some damage to their health. The action is very intense and does not take a great deal of time to perform, which makes it easy to play this game on a fairly tight schedule. A great thing about this game is that you can truly replay parts of the levels multiple times, as you discover how to fight against stronger and more difficult challenges as you progress through the game's levels.
In addition to being an incredibly thrilling game, the realistic graphics and sound effects help to create a very realistic environment in which you feel as if you really are into the story and environment. While I wouldn't go so far as to say that the graphics are very detailed and lifelike, they are present enough to really put you into the story and environment. One thing that is always a bit of a downside in games is the clipping of the player character when they become vulnerable or injured. However, in Requiem, this problem is almost nonexistent and you will rarely come across any clipping once you are playing the game - something that can be a problem depending on the level of the player character and the type of game that you are playing.