Gordon Freeman vs. Isaac Clarke

Sometimes average people are called on to do extraordinary things. They face long odds and incredible dangers, but ultimately they come through. They are heroes.

Gordon Freeman: A doctor of theoretical physics, Gordon accidentally opened a hole in space-time, allowing horrible creatures to flood our world. He has since worked to fight against them and free humanity from their scourge.

Isaac Clarke: Once just an average ship's engineer, Isaac was one of the few to survive multiple encounters with the Necromorph menace. He has done his best to save those he can, and uncover the mystery around the evil of the Necros.

Now these two heroes are about to go to war with each other. Though under-trained and unarmed initially, these two have amassed a wealth of equipment and experience in their time that will be sure to make this quite the battle. So who will it be? The Doctor or the Engineer? Aliens on Earth or far out in space? Either way, only you can decide...

WHO! IS! DEADLIEST!

(Disclaimer: Just to be clear, these two combatants were created / are owned by people far more creative / wealthier then me. I have made this, not for profit, but in the hopes of encouraging spirited discussion among fans. Please support the combatants official series. Thank you, that is all).