As most GMs would understand, often you want to create a fun campaign that is engaging with your players. The problem with mine is that it seems as though players are having too much fooling around and not taking the game somewhat serious as a roleplaying game.
Recently, we had all agreed for me to lead a Pre Heresy campaign based on Black Crusade Rules. The plan was I was to create an alternate reality where a new heresy could occur and the players could manipulate the events based on their own actions. I had been pretty excited for this as I had listened and read most of the Horus Heresy books and had a great framework for how the Heresy would take place and what critical moments would matter. I even allowed some of the players to create their own legions based on the lost legion information. The problem was is that it seems players were having too much fun with creating a ridiculous legion and not focusing on the gameplay at hand.
In fact, during the prologue of the campaign, I had a brief introduction where the players and other Astartes would have first hand glimpse of the Emperor of Mankind who would conduct a meeting with the Astartes and the important mission that lay ahead. One of the players immediately declares he would boo him since his Primarch had been one of the lost in the total 20 Legions. I asked him to reconsider, but he remained firm saying that the Emperor would not kill him for booing… Again I know this game is supposed to be fun, but I feel somewhat defeated as I had poured into the game in hopes of having characters realize the situation thhey are in and not just poke fun. They all know the 40k lore and the importance of their missions, but it seems that either the players do not care or are not fully engaged. I even had painted up models of the Emperor and the Custodians, which is a real bummer… Even though this was the first game, I almost feel like quitting from how what happened. Seems games I host end up with people not taking it seriously [other than a few players who I always enjoy having 1-on-1 games].
What do you suggest?