In this episode of the JM Gamecast, we talk about how different the difficulty was in the retro games.   The new school games tend to have the re spawn or continue feature. 

In the older ones when you lost all of your guys, you had to start back from zero. Also older games had more puzzles to the games. You had to really think about how to beat the boss, or the level.   Newer games have it where you can pick the difficulty at the start. Most times its casual, normal, hard, and very hard. Nothing wrong with this, just back in the day there was no choice you had to beat it on what they gave you.