(Moving some older posts from my shared Iron Rations blog)
"Round-by-round initiative was key to the whole combat action system though. Everyone declared their actions, THEN initiative happened. That injected a whole element of uncertainty into the game. Did you plan to boldly advance towards the altar or hang back near the door where you could restrict the enemy? If you decided to advance and the other side got the initiative you could end up in a heap of trouble, but hanging back could seriously hamper your ability to achieve some goal or other. Switches of init between the two sides also promoted the possibility of sudden reversals of fortune and gave combat an uncertain and rather chaotic caste. And of course the whole thing raised heck with magic users, especially if they were planning on using any of the longer casting time high level spells."