The items you pick up throughout a game of Paranautical Activity can make or break you. Be sure to know what you are picking up and buying, it can make the difference between winning and losing.
A rather self explaining topic. These items are what you will be using to get you through all the enimies and beat the game.
These items are what give you the power to complete the game. Without some decent upgrades, it's going to be nearly impossible to win.
Coins, hearts, armor, and bombs. These are dropped by all of the monsters throughout the game.