All the technology upgrades I've found have a suffix which seems to determine the tier or effectiveness, such as "Tau" or "Sigma". How many of these tiers are there and which is the strongest?

  • I've heard that Theta is the most powerful or effective, but I don't know of the other ranks. Aug 15, 2016 at 0:22
  • These levels are no longer applicable. They are now labeled (from lowest to highest) C, B, A, S.
    – Mufasa
    May 10, 2020 at 0:40

1 Answer 1


There are four tiers of tech upgrades: Sigma, Tau, Theta and Omega. Their comparative strengths rank as follows:

Omega > Theta > Tau > Sigma

The stronger the upgrade, the rarer/more expensive the materials required to build it will be, as noted by @David Yell.

As noted by user @SGR, not every tech has four tiers -- four is the maximum you'll see, and the comparative ranks shown above still apply to techs with fewer tiers of upgrades.

(Source, Source, Source)

  • 2
    It's worth noting that the the higher tiers of blueprint require rarer ingredients and greater quantities too.
    – Neon1024
    Aug 15, 2016 at 9:18
  • Can this answer include the strength of these tiers? How much of the circle-meter fill up with a tier 3 tech, for example.
    – Carl
    Aug 15, 2016 at 13:23
  • @Carl I'm not sure which circle-meter you're talking about (on holiday right now, so can't boot up the game). I did, however, add the upgrade "numbers" if that helps. Feel free to edit the answer with the information you're talking about.
    – pushasha
    Aug 15, 2016 at 14:53
  • User Lockness has said they found a +5.
    – DCShannon
    Aug 15, 2016 at 14:56
  • 1
    Do you need all 4 tiers of an upgrade to get the bonus? I have thetha hyperdrive but won't let me go to blue galixys that need it
    – user163150
    Aug 16, 2016 at 6:48

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