Research (LW2)
Research in LW2 proceeds much the same way as in vanilla XCOM 2, but is expanded.
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.
Golden Path
| Research | Prerequisites | Cost | Unlocks | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
 Research |
Facilities | Items |  Points |
 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 | Blacksite Vial | 3500 | 50 | - | - | - | - | - | Blacksite Data Coordinates |
Codex Brain Codex Brain |
Alien Biotech | Shadow Chamber | Codex Brain | 2400 | 25 | - | - | Encrypted Codex Data | - | - | Codex Brain Coordinates |
Encrypted Codex Data Encrypted Codex Data |
Codex Brain | Shadow Chamber | - | 3800 | 25 | - | - | - | - | - | Breach the Alien Network |
Recovered ADVENT Stasis Suit Recovered ADVENT Stasis Suit |
- | Shadow Chamber | ADVENT Stasis Suit | 4000 | 60 | - | - | Avatar Autopsy | - | - | - |
Psionic Gate Psionic Gate |
- | Shadow Chamber (Psionic Gate upgrade) |
- | 4000 | 80 | 65 | 10 | Avatar Autopsy | Mimic Beacons | - | - |
Avatar AutopsyAvatar Autopsy |
Recovered ADVENT Stasis Suit Psionic Gate |
Shadow Chamber | Avatar Corpse | 5000 | - | - | - | - | - | - | ADVENT Network Tower and Alien Fortress |
Autopsies
ADVENT Trooper autopsies require 20 corpses before they can be completed instantly. ADVENT Drone autopsies can never be completed instantly. All other research autopsies require 10 corpses or wrecks before they can be completed instantly. The check for instant completion is run after any research project is finished.
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