> Never require a player to pick up an item that is used later in the game if she can't go back and get it when it is needed. It is very frustrating to learn th

> Never require a player to pick up an item that is used later in the game if she can't go back and get it when it is needed. It is very frustrating to learn that a seemingly insignificant object is needed, and the only way to get it is to start over or go back to a saved game. This reminds me of Return to Zork, in which on the very first screen the player sees a small plant growing out of a rock. If the player misses or ignores it, or if they choose to cut it or tear it out instead of gently digging it out, they won't able to defeat the last boss.