Zombies are one of the most commonly seen enemies in video games, but the ways that developers decide to use them have led to plenty of very unique and experimental games over the years. Keeping these undead freaks slow but powerful can make for an intense and horrifying adventure, while speeding them up can result in more of a horde mode which is faster-paced and exciting, especially when jumping in with friends. Simply put, there's a reason why zombies have been around in video games for so long, but it was really from the 2000s to the mid-2010s that they began to oversaturate the market.