The attention to detail in the rules of The Temple of Elemental Evil is its biggest asset and its biggest problem. Right away it scares off casual RPG gamers leaving only intermediate and advanced gamers. The intermediate gamers are likely to struggle with having manual control over every aspect of the game, just as you would in the paper based AD&D. Leveling your party’s abilities is paramount to getting them through the game but you are given no help in doing this by the system. You are expected to know which abilities to improve and how to go about doing it.