Many old,active players in our social network groups conplain that with the playing time accumulating, the game itself has become much less challenging even when they accelerate the evaluation speed or set monster resilience to really high. As a matter of fact, the current monster options don’t play a decisive role when it comes to extending the game life since high resilience only leads to more attack times but not more playing style(a thicker sandbag is still sandbag), and high speed isn’t that dangerous when traps or slimes or mounted lazer weapons are used.
Thus we come up with an idea that, since we already have the "monster speed"and “monster resilience” adjustments in world options, why not add more options such as “monster armor” or “monster strength” that can be set by ourselves? Imagine a soldier zombie with 2 times of armor or a child zombie that can break the wall within 2 turns, how can we beat these monsters? Thinking about new strategys would be necessary here, which I guess should bring more fun to hardcore players.