"While the cutting-edge graphics are indeed impressive, it was the presentation of DOOM 3's world and story that I enjoyed the most and kept me hooked. Early in the game, you're issued a Personal Data Assistant (PDA) that can store emails, audio logs, security codes and other bits of data. As you find other PDAs strewn among all the dead bodies throughout the facility, you get a glimpse into the mindsets of the base's former inhabitants in the weeks leading up to your arrival. It's a game mechanic that's worked extremely well in games like TRON 2.0 and System Shock 2, and it works equally well here: some characters are panicked, some are mired in political struggles, and some are just Average Joes trying to do their job."