Doom 2 Extreme Gold

Doom 2 Extreme Gold is a 32-level total conversion for Doom II released on August 12, 1997 by Chuck Lai. It was the sequel to Doom II X-Treme, which was released the previous year.

Like the original, weapon and monster tweaks were performed by Lai, while

Custom weapons

 * Fists
 * Deathblade
 * Pistols
 * Shotgun
 * Auto shotgun
 * Highspeed chainguns
 * Electro-magnetic railgun
 * Explosive Tip Rifle
 * Technoblade

Custom monsters

 * Soldier - this replaces the zombieman. It has 75 hit points.
 * Chaingun Sargent - this replaces the heavy weapon dude. It has 1250 hit points.
 * IAL - this replaces the imp. It has 1500 hit points.
 * Mystic Orb - this replaces the lost soul. It has 400 hit points.
 * The spectre has 1500 points, and can walk through walls, conversely the player can walk through them as well.
 * Black Guard - this replaces the revenant. It has 3500 hit points.
 * Technomage - this replaces the cacodemon. It has 2750 hit points.
 * Summoner - this replaces the pain elemental. It has 4000 hit points.
 * Hell Lord - this replaces the baron of Hell. It has 5500 hit points.
 * Comtar - The main villain he is fought twice. On MAP29, he is a final boss replacement, similar to the prequel. In addition to spawning enemies, he also throws a volley of exploding fireballs. He has 200,000 hit points. His true form is fought in MAP30, where he resembles the Heresiarch from Hexen and fires two railgun shots which deal 500 damage each and can instantly kill even while in god mode, followed by a fireball. He has 15 million hitpoints.
 * Other monsters have their hit point values changed.

Other changes

 * The ammo limits for bullets, shotgun shells, EM-Railgun Ammo (replacing rockets), and mana (replacing energy cells) have been changed to 475, 300, 350, and 200 respectively.
 * The Technoblade only uses 2 mana per shot.
 * The megasphere is now called a darksphere, and gives the player 666% health and 666% armor.
 * The armor and megaarmor set the player's armor to 200% and 400% respectively. The latter is now called X-Armor.
 * Armor, health, keys, weapons, and ammo count toward the item percentage in the intermission screen.