Data from Stellaris v4.5.2(Cygnus) · Ancient Cache of Technologies(Workshop update 29 Sep 2026) · Gigastructural Engineering & More 3.40.4(for 4.5, updated 7 Oct 2026)
01AreaPhysicsLoading…
02TierTier 1Tap to jump · ·
03FilterAll techs
Per tier
New here?How to use it+
Pick an area. Tap Physics, Society or Engineering, or drag the slider between them.
Tick off what you've researched. Tap a tech card to mark it done; tap again to undo. Starting a new game? Press Mark starting techs first. Long-press a card (or right-click it on a computer) to see every step to that tech and how to improve your odds of getting it.
Describe your empire. In Your empire, set the year, planets, starbases, authority, ethics, civics, origin and the DLC and mods you play with. As you play, add the traditions and ascension perks you adopt under In-game choices. Every card's odds update as you go.
Read the odds. The big % on each card is the chance that tech shows up among your next research options in that area. Boosted and Reduced list the modifiers working on it now; Could boost shows what would raise it.
Watch the tiers. A tier opens once you've researched enough techs in the tier below (6 in vanilla; ACOT's tiers 6 to 10 need 2 or 4). Finished tiers grey out, and techs you can't be offered yet are greyed with the reason. Tap a tier's heading to collapse or expand it; finished tiers and tiers that haven't opened start collapsed.
Filter. Use search and the switches at the top, or the pills on each tier, to see only what's in the draw, what's left, or what you've done. Each tier also has Physics, Society and Engineering buttons so you can switch area without scrolling back up.
Keep your progress. Use + for a new campaign. If you're signed in to Claude your progress is saved to your account; otherwise it stays in this browser. To move it to another device, use Copy backup code in the ≡ menu. To keep a copy or share a campaign, open the ≡ menu and use Save campaign to file; Load campaign file brings it back as a campaign.
Odds are estimates built from the game's own research weights. Events, special projects, debris and a few rare situations aren't modelled, and other mods you run can change things.
Sets the research odds · saved per campaign
Your empire
3 options per area
Each tech's chance comes from its research weight and the game's modifiers for it. Set what's true for your empire, and the odds on every card update. Techs you've researched are counted automatically.
Picked during the game · saved per campaign
In-game choices
Update these as you unlock them. Traditions and ascension perks you adopt change the odds on many techs.
Made possible by
Credits & links
Mod
Ancient Cache of Technologies
Created by Chirumiru ShiRoz, designed with H11DN-D4NG3R, Velaroz and SOPHIA, plus the ACOT community team.
Fan-made and unofficial. Not affiliated with or endorsed by Paradox Interactive or the mod authors. Stellaris and its content belong to Paradox Interactive; mod content belongs to its authors. Background image: NGC 7129 from the James Webb Space Telescope (NASA, ESA, CSA, STScI; image processing by Alyssa Pagan, STScI). Tech icons are taken from the game and mod files and used under Paradox Interactive's fan content guidelines. Built from Stellaris v4.5.2 (Cygnus), Ancient Cache of Technologies (Workshop update of 29 September 2026) and Gigastructural Engineering & More 3.40.4 (4.5). Other game or mod versions may differ.
Stellaris Research Tracker v0.21.1 · beta · updated 24 Oct 2026 · version history
v0.21.1 Version number in the footer
v0.21.0 Prerequisite check against game files; cards name missing prerequisites; ACOT/Giga versions of vanilla techs they rewrite
v0.20.3 Collapse arrow moved to each tier's top-right corner
v0.20.2 Tier status shown beside the tier title
v0.20.1 Game and mod data versions shown under the title