The Developer Balls are included as a pun, originating from one of ROTT's designers, Tom Hall, claiming early in the design phase that the Apogee team would be the “Developers of Incredible Power,” should Rise of the Triad ever be completed. The Developer Balls, which are items much like the power-ups in the game, have the letters ‘D,’ ‘I,’ and ‘P’ on them: spelling out DIP, the initials for the Developers of Incredible Power.
The three Developer Balls don't have any effect on the game itself or your player, but should you actually collect all three, you get a 100,000 point bonus at the end of the game.
“D” - E2A6, “The Four Way Chamber”
The ‘D’ ball can be found in the circular room at the center of this level. There is an Oscuro door immediately beyond the path of a firechute. The ‘D’ is directly behind that door.
“I” - E3A3, “Dead in Five Seconds”
The ‘I’ ball is located behind a pushwall in the maze. Look for a Ballistikraft which is patrolling a dead end. Behind the pushwall in this dead end is a series of floor firejets, beyond which is the second ball.
“P” - E4A6, “Circles of Fire”Scott's Mystical Head is a joke based on the old Wizard of Oz bit, “pay no attention to that man behind the curtain!” explains Joe Siegler. The item, a digitized shot of Scott Miller, the President of Apogee, awards 2,764,331 points plus a sound clip stating, “Scott's Mystical Head!” If you're saying to yourself, “Why 2,764,331points?” then think about Apogee's phone number: 1-800-APOGEE1, 1-800-(276-4331).
The ‘P’ ball is located behind the far wall of the great, circular chamber near the beginning of the level (the one which contains four, fire wanderwalls). To open the wall, you must trigger the touchplate in a similar room further through the level: The room which contains a wide firewall beyond the door you enter through, and three braziers on the center of the floor. The touchplate is directly in front of the center brazier, but you'll have to hurry back through the door you entered by, or else the firewalls will seal off the door back to the previous room with the ‘P’ ball.
“Scott's Mystical Head” - E2A3, “The Room”
After obtaining the iron key, you have to open two doors to finally complete the level. One of the doors contains a touchplate which moves a wall leading to the final chamber (the chamber which contains the switch to move the wall behind the other of the aforementioned two doors). This chamber can be recognized by the rows of floor stabbers and a mercury mode near it's entrance. At the far end of this chamber is a jump pad leading to a catwalk, which you can follow around the outside walls of the level leading you to an alcove containing power-ups and extra lives. While on this catwalk, periodically look over the edge for the entrance to the hallway containing “Scott's Mystical Head.”