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Spawn Positions (Very Hard)

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	Player 1 (Host)	Player 2	Player 3	Player 4
Thanatos	Downstairs		Upstairs
Stalker	Cart near entrance	Cart away from entrance	Cart near entrance	Cart away from entrance
Tyrant R	Close to Tyrant R, near rubble			Near stairs

Showdown 3 Very Hard Boss Aggro Priority List Version FINAL 4.0 (Guide by myabsolution)

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What is "AGGRO"?

"Aggro" is the way in which a boss decides on targeting and attacking one player over another. If a player has primary "Aggro" this means the boss or enemy will attack them and largely ignore other players unless they get in the way. However, if the primary target is incapacitated (floored and crawling), dead, or recently injured, the boss may switch targets to the secondary target. If the boss' primary target and secondary target are dead or incapped, the boss will then switch to the tertiary aggro target. Every boss has its own individual aggro radius. If a player with primary aggro is out of this range, the boss will then go for a secondary target that is within his range to attack.

Example 1: Stalker Lion Boss does a leaping strike on his primary aggro target which lands and injures the player. The boss will then temporarily switch to the secondary aggro target and allow the primary target to recover, upon which time the boss will resume his attacks on the primary target. If Stalker's leaping strike hits both the primary and secondary target, then the tertiary target will be targeted briefly while both primary and secondary recover.

Example 2: A player who has primary aggro on a boss disconnects, freezes, dies, or leaves the game. The person who normally would have secondary aggro on that boss, will now become the primary aggro target. Tertiary target then inherits the secondary aggro target role.

Example 3: The game loads into the Tyrant-R battle and player 4 has primary aggro. However, player 4 has spawned on the other side of the battleground, behind the chopper. Since player 4 is effectively out of the range of Tyrant-R's aggro radius, the boss will immediately attack the secondary aggro target or next on its list for the interim. Should player 4 come into the aggro range of Tyrant-R and is spotted, the boss' aggro will switch back to its true primary target, player 4.

Why does this matter?

It will help you plan ahead as to who will have to lure the boss and who can safely run around. Let's pretend that the primary target gets downed and floored by Tyrant R and requires a player to pick them up. The worst possible player to revive the primary target would be the player with secondary aggro, as you could get insta-killed, or get injured further. Also if you are loading into a new boss fight on danger status, it would help knowing you have primary aggro so you can go on the defensive right away.

How is AGGRO determined?

Aggro lists in SD3 are directly tied with the item sets when you begin the game. There are four item sets for SD3. A through D. And each item set means there is a different aggro list that determines who is primary/secondary/tertiary/fourth target for each boss.

How do I know what item setup I am playing?

Generally we go by where the shotgun spawn placement is when the game begins at G-Mutant.

Item Setup A = Bottom-Left Corner

Item Setup B = Middle Center, under G-Mutant.

Item Setup C = Top-Middle, Left pickup in front of train

Item Setup D = Middle-Right side

Item Setup "A" Aggro list

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Boss	Player 1	Player 2	Player 3	Player 4
G-Mutant	Primary	Secondary	Tertiary	Fourth
Leech	Fourth	Tertiary	Secondary	Primary
Thanatos	Fourth	Secondary	Primary	Tertiary
Thanatos-R	Primary	Secondary	Tertiary	Fourth
Titan	Fourth	Tertiary	Secondary	Primary
Stalker	Tertiary	Primary	Fourth	Secondary
Lioness 1	Fourth	Secondary	Primary	Tertiary
Lioness 2	Primary	Secondary	Tertiary	Fourth
Gigabyte	Fourth	Tertiary	Secondary	Primary
Megabyte 1	Tertiary	Primary	Fourth	Secondary
Megabyte 2	Fourth	Secondary	Primary	Tertiary
Megabyte 3	Primary	Secondary	Tertiary	Fourth
Tyrant-R	Fourth	Tertiary	Secondary	Primary
Tyrant B	Fourth	Secondary	Primary	Tertiary
Tyrant A	Primary	Secondary	Tertiary	Fourth
Tyrant C	Fourth	Tertiary	Secondary	Primary

Item Setup "B" Aggro list

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Boss	Player 1	Player 2	Player 3	Player 4
G-Mutant	Fourth	Tertiary	Secondary	Primary
Leech	Tertiary	Primary	Fourth	Secondary
Thanatos	Primary	Secondary	Tertiary	Fourth
Thanatos-R	Fourth	Tertiary	Secondary	Primary
Titan	Tertiary	Primary	Fourth	Secondary
Stalker	Fourth	Secondary	Primary	Tertiary
Lioness 1	Primary	Secondary	Tertiary	Fourth
Lioness 2	Fourth	Tertiary	Secondary	Primary
Gigabyte	Tertiary	Primary	Fourth	Secondary
Megabyte 1	Fourth	Secondary	Primary	Tertiary
Megabyte 2	Primary	Secondary	Tertiary	Fourth
Megabyte 3	Fourth	Tertiary	Secondary	Primary
Tyrant-R	Tertiary	Primary	Fourth	Secondary
Tyrant B	Primary	Secondary	Tertiary	Fourth
Tyrant A	Fourth	Tertiary	Secondary	Primary
Tyrant C	Tertiary	Primary	Fourth	Secondary

Item Setup "C" Aggro list

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Boss	Player 1	Player 2	Player 3	Player 4
G-Mutant	Fourth	Secondary	Primary	Tertiary
Leech	Primary	Secondary	Tertiary	Fourth
Thanatos	Tertiary	Primary	Fourth	Secondary
Thanatos-R	Fourth	Secondary	Primary	Tertiary
Titan	Primary	Secondary	Tertiary	Fourth
Stalker	Fourth	Tertiary	Secondary	Primary
Lioness 1	Tertiary	Primary	Fourth	Secondary
Lioness 2	Fourth	Secondary	Primary	Tertiary
Gigabyte	Primary	Secondary	Tertiary	Fourth
Megabyte 1	Fourth	Tertiary	Secondary	Primary
Megabyte 2	Tertiary	Primary	Fourth	Secondary
Megabyte 3	Fourth	Secondary	Primary	Tertiary
Tyrant-R	Primary	Secondary	Tertiary	Fourth
Tyrant B	Tertiary	Primary	Fourth	Secondary
Tyrant A	Fourth	Secondary	Primary	Tertiary
Tyrant C	Primary	Secondary	Tertiary	Fourth

Item Setup "D" Aggro list

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Boss	Player 1	Player 2	Player 3	Player 4
G-Mutant	Tertiary	Primary	Fourth	Secondary
Leech	Fourth	Secondary	Primary	Tertiary
Thanatos	Fourth	Tertiary	Secondary	Primary
Thanatos-R	Tertiary	Primary	Fourth	Secondary
Titan	Fourth	Secondary	Primary	Tertiary
Stalker	Primary	Secondary	Tertiary	Fourth
Lioness 1	Fourth	Tertiary	Secondary	Primary
Lioness 2	Tertiary	Primary	Fourth	Secondary
Gigabyte	Fourth	Secondary	Primary	Tertiary
Megabyte 1	Primary	Secondary	Tertiary	Fourth
Megabyte 2	Fourth	Tertiary	Secondary	Primary
Megabyte 3	Tertiary	Primary	Fourth	Secondary
Tyrant-R	Fourth	Secondary	Primary	Tertiary
Tyrant B	Fourth	Tertiary	Secondary	Primary
Tyrant A	Tertiary	Primary	Fourth	Secondary
Tyrant C	Fourth	Secondary	Primary	Tertiary

Item Location Guide by Nunes

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G-Mutant

#	Set A	Set B	Set C	Set D
1	Shotgun	Hammer	Green Herb	Green Herb
2	Green Herb	Green Herb	Magnum Handgun	Survival Knife
3	Red Herb	Green Herb	Blue Herb	Handgun Rounds (30)
4	Magnum Handgun	Shotgun	Green Herb	Green Herb
5	Survival Knife	Magnum Handgun	Green Herb	Red Herb
6	Handgun Magazine	Red Herb	Hammer	Shotgun
7	Handgun	Survival Knife	Red Herb	Handgun Magazine
8	Green Herb	Green Herb	Survival Knife	Handgun
9	Blue Herb	Battery	Blue Herb	Burst Handgun
10	Battery	Recovery Medicine (3)	Battery	Blue Herb
11	Blue Herb	Handgun Rounds (30)	Recovery Medicine (3)	Blue Herb
12	Handgun Rounds (30)	Blue Herb	Burst Handgun	Recovery Medicine (3)
13	Recovery Medicine (3)	Burst Handgun	Handgun Rounds (30)	Battery
14	Burst Handgun	Blue Herb	Handgun	Hammer
15	Green Herb	Handgun Magazine	Shotgun	Magnum Handgun
16	Hammer	Handgun	Handgun Magazine	Green Herb

Giant Leech

#	Set A	Set B	Set C	Set D
1	Shotgun Rounds (14)	Green Herb	Iron Pipe	Grenade Launcher (Burst/3)
2	Grenade Launcher (Burst/3)	Iron Pipe	Handgun Rounds (30)	Newspaper + Bottle
3	Handgun Rounds (30)	Shotgun Rounds (14)	Grenade Launcher (Burst/3)	Acid Rounds (3)
4	First Aid Spray	First Aid Spray	Hammer	Hammer
5	Newspaper + Bottle	Handgun Rounds (30)	First Aid Spray	First Aid Spray
6	Handgun	Anti Virus (1)	Green Herb	Shotgun Rounds (14)
7	Acid Rounds (3)	Grenade Launcher (Burst/3)	Newspaper + Bottle	First Aid Spray
8	First Aid Spray	Newspaper + Bottle	Red Herb	Green Herb
9	Blue Herb	First Aid Spray	Anti Virus (1)	Handgun
10	Red Herb	Acid Rounds (3)	First Aid Spray	Blue Herb
11	Hammer	Hammer	Green Herb	Anti Virus (1)
12	Anti Virus (1)	Green Herb	Handgun Magazine	Green Herb
13	Iron Pipe	Handgun	Shotgun Rounds (14)	Handgun Rounds (30)
14	Green Herb	Handgun Magazine	Handgun	Iron Pipe
15	Handgun Magazine	Blue Herb	Acid Rounds (3)	Red Herb
16	Green Herb	Red Herb	Blue Herb	Handgun Magazine

Suspended

#	Set A	Set B	Set C	Set D
1	Bomb Switch	No item	No item	Handgun
2	Handgun Rounds (20)	Battery	No item	Anti Virus (3)
3	Iron Pipe	Newspaper + Bottle	No item	Bomb Switch
4	Blue Herb	Bomb Switch	Battery	Handgun Rounds (20)
5	Anti Virus (3)	No item	Green Herb	Green Herb
6	Green Herb	Blue Herb	Handgun Rounds (20)	Newspaper + Bottle
7	Newspaper + Bottle	Handgun Rounds (20)	Anti Virus (3)	No item
8	Grenade Launcher (Burst/3)	Green Herb	Newspaper + Bottle	Iron Pipe
9	Battery	No item	Grenade Launcher (Burst/3)	No item
10	No item	Anti Virus (3)	No item	Battery
11	No item	Iron Pipe	Bomb Switch	Blue Herb
12	No item	Handgun	Green Herb	Grenade Launcher (Burst/3)
13	No item	Grenade Launcher (Burst/3)	Iron Pipe	No item
14	Green Herb	Green Herb	Red Herb	Red Herb
15	Red Herb	Red Herb	Handgun	No item
16	Handgun	No item	Blue Herb	Green Herb

Thanatos

#	Set A	Set B	Set C	Set D
1	Red Herb	Green Herb	Lighter	Handgun Rounds (15)
2	Iron Pipe	Handgun	Survival Knife	Spear
3	Handgun Rounds (30)	First Aid Spray	Handgun	Iron Pipe
4	First Aid Spray	Handgun Rounds (15)	First Aid Spray	Handgun Rounds (30)
5	Green Herb	Red Herb	Handgun Rounds (15)	First Aid Spray
6	Handgun Rounds (15)	Lighter	Red Herb	Green Herb
7	Green Herb	Shotgun Rounds (14)	No item	No item
8	No item	No item	Green Herb	Red Herb
9	Survival Knife	Green Herb	First Aid Spray	Assault Rifle
10	Assault Rifle	First Aid Spray	Spear	First Aid Spray
11	Battery	Assault Rifle	Green Herb	Survival Knife
12	Spear	Survival Knife	Assault Rifle	Battery
13	Lighter	Iron Pipe	Shotgun Rounds (14)	Green Herb
14	Handgun	Battery	Handgun Rounds (30)	Shotgun Rounds (14)
15	Shotgun Rounds (14)	Handgun Rounds (30)	Iron Pipe	Lighter
16	First Aid Spray	Spear	Battery	Handgun

Thanatos-R

#	Set A	Set B	Set C	Set D
1	Red Herb	Red Herb	Blue Herb	No item
2	Iron Pipe	Iron Pipe	Green Herb	Survival Knife
3	Survival Knife	Survival Knife	Iron Pipe	Newspaper + Bottle
4	Newspaper + Bottle	Acid Rounds (3)	Survival Knife	Spear
5	Handgun Magazine	Newspaper + Bottle	.45 Rounds (7)	No item
6	No item	Scrub Brush	No item	Green Herb
7	No item	Green Herb	Red Herb	Scrub Brush
8	Handgun Rounds (15)	Handgun Rounds (15)	No item	Blue Herb
9	.45 Rounds (7)	No item	Handgun Magazine	Handgun Rounds (15)
10	Acid Rounds (3)	Spear	Newspaper + Bottle	Green Herb
11	Scrub Brush	.45 Rounds (7)	Green Herb	Handgun Magazine
12	Spear	No item	Acid Rounds (3)	Acid Rounds (3)
13	Green Herb	Green Herb	Spear	Iron Pipe
14	Blue Herb	Blue Herb	Handgun Rounds (15)	Red Herb
15	Green Herb	Handgun Magazine	Scrub Brush	.45 Rounds (7)

Zombie Elephant

#	Set A	Set B	Set C	Set D
1	First Aid Spray	Blue Herb	Green Herb	Handgun Rounds (30)
2	Green Herb	Handgun	Blue Herb	First Aid Spray
3	Blue Herb	Red Herb	Handgun	Green Herb
4	Handgun	Green Herb	Red Herb	Blue Herb
5	Spear	Burst Rounds (2)	No item	Assault Rifle
6	No item	Green Herb	Spear	Iron Pipe
7	Green Herb	Iron Pipe	Battery	Red Herb
8	Iron Pipe	Spear	Assault Rifle	Battery
9	Red Herb	Battery	Green Herb	Handgun
10	Assault Rifle	No item	Iron Pipe	Green Herb
11	Handgun Rounds (30)	Green Herb	First Aid Spray	Green Herb
12	Green Herb	First Aid Spray	No item	Burst Rounds (2)
13	Burst Rounds (2)	No item	Green Herb	No item
14	Battery	Assault Rifle	Handgun Rounds (30)	No item
15	No item	Handgun Rounds (30)	Green Herb	Green Herb
16	Green Herb	Green Herb	Burst Rounds (2)	Spear

Zombie Lion

#	Set A	Set B	Set C	Set D
1	Red Herb	Spear	Handgun Rounds (15)	Handgun Rounds (15)
2	Handgun	Newspaper + Bottle	No item	No item
3	Iron Pipe	Green Herb	No item	No item
4	Green Herb	Handgun Rounds (15)	Red Herb	Red Herb
5	No item	Burst Rounds (3)	Newspaper + Bottle	Green Herb
6	Handgun Rounds (15)	Handgun Rounds (15)	Spear	Spear
7	Spear	No item	Handgun Rounds (15)	Handgun Rounds (15)
8	No item	Hammer	Shotgun Rounds (14)	Shotgun Rounds (14)
9	Handgun Rounds (15)	Shotgun Rounds (14)	No item	No item
10	Newspaper + Bottle	Green Herb	First Aid Spray	First Aid Spray
11	No item	First Aid Spray	Green Herb	Newspaper + Bottle
12	Green Herb	Handgun	Burst Rounds (3)	Hammer
13	Hammer	No item	Handgun	Iron Pipe
14	First Aid Spray	Red Herb	Green Herb	Green Herb
15	Shotgun Rounds (14)	Iron Pipe	Hammer	Burst Rounds (3)
16	Burst Rounds (3)	No item	Iron Pipe	Handgun

Gigabite

#	Set A	Set B	Set C	Set D
1	Spear	Shotgun	Green Herb	No item
2	No item	Green Herb	Spear	Battery
3	Green Herb	Magnum Rounds (7)	Acid Rounds (3)	Green Herb
4	Green Herb	Acid Rounds (3)	Shotgun	Spear
5	Battery	Spear	No item	Red Herb
6	Red Herb	No item	Battery	Blue Herb
7	First Aid Spray	Green Herb	Red Herb	Red Herb
8	Blue Herb	Handgun Magazine	Green Herb	First Aid Spray
9	Handgun Magazine	Hemostat (3)	Magnum Rounds (7)	Green Herb
10	Magnum Rounds (7)	Blue Herb	First Aid Spray	Acid Rounds (3)
11	Iron Pipe	Iron Pipe	Handgun Magazine	Blue Herb
12	Red Herb	Red Herb	Blue Herb	Hemostat (3)
13	Shotgun	Red Herb	Hemostat (3)	Handgun Magazine
14	Hemostat (3)	Blue Herb	Blue Herb	Magnum Rounds (7)
15	Acid Rounds (3)	First Aid Spray	Red Herb	Shotgun
16	Blue Herb	Battery	Iron Pipe	Iron Pipe

Tyrant-R

#	Set A	Set B	Set C	Set D
1	Shotgun Rounds (21)	Grenade Launcher (Acid/6)	Spear	Green Herb
2	Handgun Rounds (15)	First Aid Spray	Green Herb	No item
3	First Aid Spray	Red Herb	Burst Rounds (3)	Green Herb
4	Spear	No item	Red Herb	First Aid Spray
5	Recovery Medicine (3)	Recovery Medicine (3)	No item	No item
6	Red Herb	Shotgun Rounds (21)	Green Herb	Burst Rounds (3)
7	No item	Green Herb	Shotgun Rounds (21)	Red Herb
8	Hammer	Hammer	Recovery Medicine (3)	Recovery Medicine (3)
9	No item	No item	Handgun Rounds (15)	Grenade Launcher (Acid/6)
10	Green Herb	Burst Rounds (3)	Grenade Launcher (Acid/6)	Shotgun Rounds (21)
11	Burst Rounds (3)	Green Herb	Green Herb	Green Herb
12	Blue Herb	Blue Herb	Hammer	Hammer
13	Green Herb	Spear	First Aid Spray	Handgun Rounds (15)
14	Green Herb	Green Herb	No item	No item
15	Grenade Launcher (Acid/6)	Handgun Rounds (15)	No item	Spear
16	No item	No item	Blue Herb	Blue Herb

Nyx

#	Set A	Set B	Set C	Set D
1	Survival Knife	Green Herb	Red Herb	Battery
2	Green Herb	Battery	Green Herb	Survival Knife
3	Hammer	Rocket Launcher	Handgun Rounds (15)	Assault Rifle Clip
4	No item	Hammer	Assault Rifle Clip	Green Herb
5	Green Herb	Burst Rounds (3)	Green Herb	Blue Herb
6	Red Herb	Iron Pipe	Rocket Launcher	Hammer
7	Green Herb	Red Herb	Iron Pipe	Red Herb
8	Assault Rifle Clip	Handgun Rounds (15)	Hammer	No item
9	Handgun Rounds (15)	Blue Herb	Burst Rounds (3)	Green Herb
10	Iron Pipe	Green Herb	Green Herb	Rocket Launcher
11	Rocket Launcher	Green Herb	Blue Herb	Handgun Rounds (15)
12	Green Herb	Assault Rifle Clip	No item	Red Herb
13	Red Herb	No item	Green Herb	Iron Pipe
14	Battery	Red Herb	Red Herb	Green Herb
15	Burst Rounds (3)	Survival Knife	Battery	Green Herb
16	Blue Herb	Green Herb	Survival Knife	Burst Rounds (3)

Tyrant-C

#	Set A	Set B	Set C	Set D
1	Iron Pipe	Green Herb	Burst Rounds (5)	Battery
2	Green Herb	Hammer	Magnum Handgun	Green Herb
3	Green Herb	Assault Rifle	Hammer	Handgun
4	Magnum Handgun	Green Herb	Newspaper + Bottle	Hammer
5	Shotgun	Shotgun	Newspaper + Bottle	Handgun Rounds (30)
6	Handgun	Newspaper + Bottle	Assault Rifle	Magnum Handgun
7	Handgun Rounds (30)	Handgun Rounds (30)	Shotgun	First Aid Spray
8	Hammer	Hammer	Green Herb	Assault Rifle
9	First Aid Spray	First Aid Spray	Handgun Rounds (30)	Hammer
10	Assault Rifle	Iron Pipe	Hammer	Newspaper + Bottle
11	Newspaper + Bottle	Battery	Iron Pipe	Green Herb
12	Newspaper + Bottle	Handgun	Green Herb	Burst Rounds (5)
13	Green Herb	Newspaper + Bottle	Battery	Shotgun
14	Battery	Green Herb	Green Herb	Newspaper + Bottle
15	Burst Rounds (5)	Magnum Handgun	Handgun	Green Herb

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Special Boss Notes/Considerations/Updates

(Version FINAL 4.0 Updated 04/06/16)

Latest Update: COMPLETED! I found the pattern that every aggro set repeats itself every fourth boss earlier at the end of 2015. That made it FAR EASIER to map an entire item set's aggro list because we didn't have to check every single boss if we knew the pattern (time saver!). So as of June 04, 2016 I mapped B, C, D with friends (in special thanks). There are essentially four aggro patterns and they are interchanged. Nothing super complex but it was hard to see a pattern and get the boss order list, and of course get people willing to do these tests :) These lists are now complete, and I am very thrilled. Hopefully someone (maybe no one!) can use it for knife runs or any specialty match for challenge runs.

Leech Boss: Leech boss aggro is possible by which it can be "lure-locked" based on who has primary aggro, which is fairly useful on specialty SD3 matches like speed runs/melee/knife runs.

General Info: Some bosses are absent such as Regis licker, as she does nothing special for her target over others. And Nyx has three separate aggros and it doesn't make much difference who has aggro. He will still walk into a wall instead of walk towards people :/

Special Thanks

People who helped me map the early SD3 Aggro Charts in 2014: nunes, EliminatorDemon, RE_Freak, Seraph, Silent Hell, and StuntmanSnake

BIG thanks to those in 2016 who helped me complete A, and finished B, C, D: nunes, Assassinman23, and REFan988/ResidentEvil988