Research (LW2)

Research in Long War 2 has been expanded with two more weapon tier techs, one more autopsy, and more Proving Grounds projects unlocked by autopsies.

• Unlocked items in bold don't need any other project, while items in italics need another research or Proving Grounds project to be fully available.

Research Time

The time to research a project is based on a points system: each project has a required amount of points to complete, and each hour a number of points is added depending on the number of scientists in the Avenger and how they're staffed.

At the start of the game, the only contribution to research comes from Tygan, counts as a scientist contributing 10 science points per hour, but he cannot be assigned to any scientist staff slots. Each additional scientist contributes another 5 points per hour, increasing to 10 if they're working in a laboratory, but if they're staffed in any other facility, they won't be able to contribute to research.

The "Basic Research" project will increase the base points per hour by 5, and it is infinitely repeatable, but each completion increases the cost of the next one by 2800 points.

Xenology

These projects study the aliens' capabilities in a way that doesn't fit in other categories.

Research	Prerequisites	Cost		Unlocks
	Research	Points	Supplies	Research	Proving Ground	Facilities	Items
Alien Biotech Alien Biotech	-	1300	-	Most autopsies	Hazmat Vest	-	AP Rounds
Psionics Psionics	Sectoid Autopsy	4500	30	Gatekeeper Autopsy Wraith Suit	-	Psi Lab Second Cell (Psi Lab upgrade)	Neurowhip Advanced Psi Amp Alien Psi Amp

Alien Autopsies

Once Alien Biotech has been researched, corpses recovered from some missions can be autopsied. If enough corpses are available, the autopsy will take no time to complete, but only one corpse will be consumed.

Research	Prerequisites	Cost		Unlocks
	Research	Points	Corpses	Research	Proving Ground	Facilities	Items
Sectoid Autopsy Sectoid Autopsy	Alien Biotech	2200	1x Sectoid Corpse (10x for Instant)	Psionics	Talon Rounds	-	Mind Shield Advanced PCS: Focus
Viper Autopsy Viper Autopsy	Alien Biotech	2500	1x Viper Corpse (10x for Instant)	Viper King Autopsy	Battlefield Medicine Venom Rounds Gas Grenade	-	-
Muton Autopsy Muton Autopsy	Alien Biotech	3500	1x Muton Corpse (10x for Instant)	Berserker Autopsy Muton Elite Autopsy	Tactical Vest Plasma Grenade	-	Vibroblade
Berserker Autopsy Berserker Autopsy	Muton Autopsy	3500	1x Berserker Corpse (10x for Instant)	Berserker Queen Autopsy	Hellweave	-	Overdrive Serum
Muton Elite Autopsy Muton Elite Autopsy	Muton Autopsy	4000	1x Muton Elite Corpse (10x for Instant)	-	Carapace Plating Dragon Rounds	-	Blaster Gauntlet
Archon Autopsy Archon Autopsy	Alien Biotech	4000	1x Archon Corpse (10x for Instant)	Archon King Autopsy	Acid Grenade	-	Fusion Blade Fusion Axe
Faceless Autopsy Faceless Autopsy	Alien Biotech	3500	1x Faceless Corpse (10x for Instant)	-	Chameleon Suit Needle Rounds	-	-
Chryssalid Autopsy Chryssalid Autopsy	Alien Biotech	2500	1x Chryssalid Corpse (10x for Instant)	-	Chitin Plating Flechette Rounds	-	-
Andromedon Autopsy Andromedon Autopsy	Alien Biotech	4000	1x Andromedon Corpse (10x for Instant)	-	Advanced Grenades	-	Holotargeter Mark III
Gatekeeper Autopsy Gatekeeper Autopsy	Psionics	5000	1x Gatekeeper Corpse (10x for Instant)	-	-	-	Arc Blaster Superior PCS: Focus Alien Psi Amp

Golden Path

These projects form a major part of the storyline, beginning when either the Blacksite mission is completed or when a Codex Brain is recovered from Skulljacking an ADVENT Officer. The first of these unlocks the Shadow Chamber, a facility needed for every storyline project afterwards. These projects will unlock further storyline missions, including the final ones.

Research	Prerequisites		Cost					Unlocks
	Research	Other	Points	Items	Intel	Supplies	Elerium Crystals	Research	Proving Ground	Facilities	Missions
Alien Encryption Alien Encryption	-	Blacksite Vial or Codex Brain	3580	-	40	-	-	-	-	Shadow Chamber	-
Blacksite Vial Blacksite Vial	-	Shadow Chamber	3500	Blacksite Vial	50	-	-	-	-	-	Blacksite Data Coordinates
Codex Brain Codex Brain	Alien Biotech	Shadow Chamber	2400	Codex Brain	25	-	-	Encrypted Codex Data	-	-	Codex Brain Coordinates
Encrypted Codex Data Encrypted Codex Data	Alien Biotech Codex Brain	Shadow Chamber	3800	-	25	-	-	-	-	-	Breach the Alien Network
Recovered ADVENT Stasis Suit Recovered ADVENT Stasis Suit	-	Shadow Chamber	4000	ADVENT Stasis Suit	60	-	-	Avatar Autopsy	-	-	-
Psionic Gate Psionic Gate	-	Shadow Chamber (Psionic Gate upgrade)	4000	-	80	65	10	Avatar Autopsy	Mimic Beacons	-	-
Avatar Autopsy Avatar Autopsy	Alien Biotech Recovered ADVENT Stasis Suit Psionic Gate	Shadow Chamber	5000	Avatar Corpse	-	-	-	-	-	-	ADVENT Network Tower and Alien Fortress

Comprehensive Tech Tree

Created by Reddit User exodusinfinite

The Basic Tech Tree 1.3 (without Item stats) is available here

The full Comprehensive Tech Tree 1.3 (including item stats) is available here

File:XCOM_2_Long_War_1_3_Tech_Tree_(no_stats).jpg