An awesome Infection that just had so many creative ideas but really went unnoticed I think was
NightFall by Time Glitch from Flem Productions. He has created a map that is just so much fun. The idea of trapping the Zombies and also having the Warthog trapped inside the secret openable door is just genuis. Also having a human trapped in the other base is just so cool. And the idea of having to unblock teleporters so Zombies can't run into the base through that entrance is just so cool. It is the best Infection map I have ever played by far.