DOOM II Hell On Earth - Voxel and Smooth Mods - The Living End - Icon of Sin - Ultra Violence
0MAP30: Icon of Sin (MAP32 in GBA) is the thirtieth and final map of Doom II. It was designed by Sandy Petersen and uses the music track "Opening to Hell".
Pick up the weapons and powerups and go through the teleporter (A). The player will arrive at the lowest of a series of large step-like platforms (B). The Icon of Sin will make its unholy introductory speech, and then immediately begin firing cubes with skulls on their sides, which spawn monsters when they land. The Icon of Sin can spawn any monster in the game except for former humans, Wolfenstein SS, Cyberdemons or Spiderdemons. Each 'step' in the simple construction is an elevator which can be activated by pressing on the demonic face on its side. Be ready to defeat or bypass the first monsters created by the boss, and be careful with the incoming cubes, as they may telefrag the player, independent of whether or not he is invincible by means of the God Mode cheat or invulnerable by means of the invulnerability artifact. Get to the top step and use the demonic switch found there. A small platform in the blood pool at the bottom of the steps will rise up (C).
Before you head up, if you are playing this level using the Ultra-Violence difficulty, kill the Revenant on the platform immediately below the boss - it may disrupt your rocket attacks. When the pillar-like platform in the slime has stopped rising, press on its side. The square pillar will lower down to the floor (a lift). Stand on the pillar and select the rocket launcher (D). Turn to face the huge cybernetic face of the boss on the wall over the platform across the series of steps. The platform will rise; slightly before the elevator reaches the top, launch a rocket towards the demon's exposed brain. If timed correctly, the rocket will enter the opening exposing the brain (E) and an echoing low-pitched pain sound will be heard. This takes practice to time correctly, although it can be said that firing as the tip of the rocket launcher reaches the gigantic demon's chin is reliable. Three direct hits are generally necessary to defeat the boss. When defeated, explosions occur in front of its hideous visage and the game exits to the intermission screen.
Advanced techniques to destroy the boss quickly include running down to the rising pillar from the switch atop the huge steps, lowering the pillar from the edge once it has reached the top to fire again, and firing while jumping off the pillar, possibly towards the platform below the face to acquire some powerups.
Dodging the horde of monsters spawned by the boss is a challenge, and often one must lure a group of monsters away from the platform before jumping on it again or kill them with the BFG or another high powered weapon. Arch-viles, Pain Elementals, Arachnotrons, and Revenants are particularly disruptive as their advanced attack modes can easily hinder or damage the vulnerable player atop the pillar. Pain Elementals and Arch-viles should be focused on if the player takes on the horde, as the Pain Elemental's ability to spawn endless Lost Souls and the Arch-vile's ability to resurrect slain demons are even more dangerous than usual when combined with the endless stream of demons created by the Icon of Sin.
Two radiation suits are located on the platform directly below the evil visage. These are a convenience against the damaging slime at the foot of the pillar, although lower skill levels (I'm Too Young To Die and Hey, Not Too Rough) provides invulnerability powerups, one at each corner of the pillar, to ease the task for novices. Monster infighting and some monster telefragging will occur and help to limit how dense the horde becomes.
If you remain in this level for too long, it will fill up with monsters. With this, there is a possible chance that the game may crash, either due to too many monsters onscreen at once, or an excessive amount of movement by monsters, typically if this level is played with the fast monsters parameter set.
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