Sadly, by making your targets behave less like humans and more like video game enemies, there are some gameplay issues. (bit-tech.net)
The game console tracks you as you run down real hallways away from video game enemies, or as you hide from other players behind couches and walls. (sciencedaily.com)
Though the shambling hordes of undead have appeared as video game enemies for decades, the last few years in particular have proven that they can be much more than brainless bullet fodder. (gamesradar.com)