While Unreal certainly provides gamers with a lot of action, there is also much subtlety involved in the overall presentation. You'll never fight anything, but you'll also never lose the feelings of wonder, excitement, and dread. One excellent sequence comes in front of a jammed door, behind which you can hear both anguished screams and the clear sound of someone being ripped apart. The perfect mood-setting plot device that scares and thrills the player. Some of the Vortex Rikers carnage and a glimpse of what's to come.
Levels are also extremely varied in regards to terrain.
One might consist of narrow tunnels and small rooms. Another might see you roaming through wide-open valleys under that haunting sky. Just like the combat, the backdrops are so diverse as to virtually prevent boredom. A further illustration of imagination at work is more difficult to explain. You can't really appreciate this until you actually play the game, but the amount of sheer creativity that went into Unreal truly transports you to another time and place.