Radiation
Avoid the radioactive materials if you do not possess the protection against them. Hazmat suit is good for avoiding both Uranium and Plutonium. If you feel sick after handling the materials, try to find the special, experimental radiation pills made by the personnel. Should be found in medical cabinets and on some tables around the lab.
Radiation is a mechanic in Mod of Redemption that causes players to become irradiated if they linger near radioactive material for lengthy periods of time, inflicting increasingly dangerous debuffs over time until the player dies. The Geiger-Muller accessory can be used to indicate if the player is susceptible to becoming irradiated.
The player’s radiation level is a value indicating the intensity of the player’s radiation. Different sources causes this level to increase, up to a maximum of 5. The level rising is not guaranteed, and has a chance every ingame frame to increase. The Hazmat Suit and HEV Suit both are capable of preventing low-level and medium-level radiation respectively, but some sources are so intense they can still increase the player’s radiation level.
A player who experiences radiation exposure will not suffer from debuffs, instead a hidden timer is started as soon as the player’s radiation level is above 1. The timer is set to
5 minutes and once the timer ends, the Headache debuff appears at random, followed by Fatigue and Nausea. If a Radiation Pill is not used in time, the Hair Loss and Skin Burn will add up, preventing the possibility to cure from the growing radiation poisoning and allowing the Irradiated debuff to occur, ultimately leading to the player’s death. There is a chance that the player will cure naturally from radiation poisoning instead of suffering from Fatigue and/or Nausea. The chances depend on the player’s radiation level, for instance a player with level 1 radiation will most probably cure naturally from it than one with higher levels, althrough this is not guaranteed to happen.
Abandoned Lab
Map view of the Abandoned Lab, along with the direct path to the end (click to enlarge). The white path is accessible post-Mechanical Bosses, and red path is accessible post-Moon Lord.
The Abandoned Lab is a massive underground dungeon that generates upon world generation. Unlike other areas in Terraria, the Abandoned Lab has a static structure and will always be the same in all worlds. With its dangerous defenses and debuffs, the player must exercise caution prior to entering, it size is similar to temple.
The Abandoned Lab will always be generated at the same location, depending on map size:
| Map Size | Lateral Position | Depth |
|---|---|---|
| Small | 600′ East | 824′ Underground |
| Medium | 820′ East | 1244′ Underground |
| Large | 1020′ East | 1904′ Underground |
It’s recommended to acquire the IO-Locator accessory and equip it before trying to find the lab.
The Abandoned Lab can only be initially visited in Hardmode, after the player has defeated all three Mechanical Bosses; attempting to visit the Lab prior will unleash invincible Laboratory Drones that will relentlessly attack the player. Following the defeat of the Mechanical Bosses, the drones will be deactivated, allowing access to a portion of the Lab, including the rooms containing The Janitor, Stage 3 Infected Scientist, and Irradiated Behemoth mini bosses, as well as a number of items from Petrified Wood Chests. Each mini boss drops a Lab Access Panel, which deactivates the laser security systems to unlock additional sectors of the Lab.
Contents [ ]
Sludge Blob 
Infection Hive 
Irradiated Sludge 
Infected Scientist 
Xeno Chomper (Spawned by Sewer Holes ) 
The Janitor (Mini Boss) 
Stage 3 Infected Scientist (Mini Boss) 
Irradiated Behemoth (Mini Boss)
Infected Scientist (Stage 2) 
Blisterface (Mini Boss) 
Protector Volt (Mini Boss) 
MACE Project (Mini Boss) 
Patient Zero (Boss)
Floppy Disk 1 Mod of Redemption/Floppy Disk 3 Floppy Disk 3 
Scrap Metal 
AI Chip 
Mk-1 Capacitator 
Mk-2 Capacitator 
Mk-3 Capacitator 
Mk-1 Plating 
Mk-2 Plating 
Mk-3 Plating 
Anti-Crystallizer Serum 
Carbon Myofibre 
Starlite 
Xenomite Shard 
Holoshield 
Mini-Nuke 
Xeno Eye 
Plasma Saber 
Radioactive Launcher 
Sludge Spoon
From the Hazmat Suit corpse:
Mod of Redemption/Floppy Disk 4 (1/4) Floppy Disk 4 (1/4) Mod of Redemption/Floppy Disk 4 (2/4) Floppy Disk 4 (2/4) Mod of Redemption/Floppy Disk 4 (3/4) Floppy Disk 4 (3/4) Mod of Redemption/Floppy Disk 4 (4/4) Floppy Disk 4 (4/4) Scrap Metal AI Chip Mk-3 Capacitator Mk-3 Plating 
Raw Xenium Starlite Xenomite Shard 
Electronade 
Luminite 
Terraforma Bomba Tail 
Terraforma Bomba Core 
Terraforma Bomba Nose 
Hazmat Suit 
Mysterious Xenomite Fragment 
Mitosis 
DNAgger 
Empty Mutagen 
Tesla Manipulator Prototype
From the special Lab Chest :
From All Abandoned Lab enemies:
Fallen
The Fallen is an NPC vendor that will spawn once the following conditions have been met:
Unlike other Town NPCs, the Fallen has no means to defend himself. However, he will spawn The Remnants upon death.
His prices are not affected by the Charisma Potion or the Discount Card.
Items sold [ ]
Old Gathic Waraxe
Bronze Greatsword 
Bronze Wand 
Ancient Dirt 
Ancient Wood 
Ancient Stone 
Mysterious Tablet (Corrupt) 
Mysterious Tablet (Crimson) 
Small Lost Soul 
Lost Soul 
Small Shadesoul 
Ectoplasm 
Dark Fragment 
Heart Insignia Quotes [ ]
The quotes of this Town NPC are unique. If his name is different, he’ll have different personalities.
When the Fallen’s name is Okvot:
When the Fallen’s name is Happins:
When the Fallen’s name is Tenvon:
When the player clicks «Repair fragments»:
Names [ ]
The Fallen can only have 1 out of the 3 following possible names:
All NPCs
Contents
All NPCs [ ]
Pre-Hardmode: [ ]
Hostile [ ]
After Skeletron has been defeated
After The Keeper has been defeated
After The Keeper has been defeated
After The Mighty King Chicken has been defeated
After Xenomite Crystal has been defeated
After Xenomite Crystal has been defeated
After Xenomite Crystal has been defeated
Friendly [ ]
Hardmode: [ ]
Hostile [ ]
After Plantera & Infected Eye has been defeated
After Xenomite Crystal has been defeated
After Plantera & Infected Eye has been defeated
After all Mechanical Bosses have been defeated
After Infected Eye has been defeated
After Plantera has been defeated
After Xenomite Crystal has been defeated
After Plantera & Infected Eye has been defeated
MACE Project
| Type | Boss |
|---|---|
| Environment | Abandoned Lab |
| AI Type | MACE Project AI |
| Damage | 100 |
| Max Life | 125,000 / 150,000 Total: 250,000 / 300,000 |
| Defense | Phase 1: 50 Phase 2: 70 |
| KB Resist | 100% |
| Type | Boss |
|---|---|
| Environment | Abandoned Lab |
| AI Type | MACE Project’s Fist AI |
| Damage | 180 / 180 |
| Max Life | 20,000 / 40,000 |
| Defense | 70 |
| KB Resist | 100% |
A work of genius, perfect at wiping out a large group of enemies in an instant.
MACE Project is a Post-Moon Lord mini boss found in the Abandoned Lab. It is the sixth and final mini boss of the Abandoned Lab. It fires fireballs, bombs and lasers in the first phase, and summons fists to attack in the second phase. It is summoned by right-clicking its specific monitor in the Omicron Sector of the Abandoned Lab.
While MACE Project is alive, the music Boreal Defendant will play.
Contents
Spawn [ ]
MACE Project does not spawn on its own and is only summoned by right-clicking the monitor in the Abandoned Lab’s Omicron Sector, unlocked after defeating Protector Volt.
Behavior [ ]
Phase 1 [ ]
MACE Project is initially stationary, hanging from the ceiling of the room. It will hit players with a variety of projectile attacks in a fixed order. The frequency and number of its attacks go up as it loses health.
At low health (about 33%), a warning alarm will sound as MACE Project switches out its attack order.
Phase 2 [ ]
Upon its initial defeat, MACE Project’s Jaw breaks off, leaving only the upper head behind. Its HP effectively refills, and it gains a new attack pattern. The order of its attacks is still fixed.
At 50% HP, MACE summons its two fists, which hover above players and try to line up with them. They occasionally pause and slam down to deal damage, creating a shockwave that travels along the ground on impact. While the fists are alive, MACE will take almost no damage from attacks, but will be immobile and unable to attack outside of an occasional laser.
Once the fists are destroyed, MACE Project continues its previous attack pattern until its defeat.