Ars Technica - When religion and games intersect-and how it often goes badly.
In fact, religion seems to be such a taboo subject to include in video games that the only type of faith that really appears in titles here in the US is Christianity. Even then, the subject is often poorly addressed in games that are themselves poorly made. But why is it that religious content is so sparse in the realm of video games? The reasons are largely based on contention between religious and industry leaders, as well as the fact that you'll rarely find a topic as personal as faith.

Gamasutra - The Evolution Of The Class System In Games. Thanks Joker961.
This concept of min/maxing was something that grew out of the character design method of D&D. Depending on the character a player wanted, they could throw all of their weakness onto an irrelevant stat and turn themselves into a monster. TF2 characters are premade with this design in mind, so there’s less room for play customization, but less worry about game balance.