This is the full image of the tech tree, combined from multiple screenshots with Snagit:


Each of the node in the tree (of course) denotes technologies/infrastructures/etc available to be unlocked in the game. To unlock them you will need to hire scientists to research them. When you completed the research, new nodes will be available for researching further. These unlocked nodes can also be upgraded with upgrade points (gaining from free scientists) which will make machine runs cheaper, better drugs bonus, new functionality to the machine, etc.

Regarding the upgrade, not all nodes can be upgraded, for example, base infrastructures nodes cannot be upgraded since there's no point to. Upgradable nodes can be upgraded either to level 3 or 5. The amount of upgrade points needed of each level upgrade can be seen in the table below.


Now, you know everything required about the tech tree.

Note: If you're curious, there are 40 nodes in the tech tree.

This is the simple, text-based, indented version of the tech tree. You can use this as a quick reference of how things are connected.

Now, let's see the breakdown of each node. I will list the following:

• Node name
  
• Scientists (sc) and time (mo, time in months) required to research the node.
  
• Possible upgrading levels
  
• What you will get from upgrading to each level.

The listing will be alphabetically for easy searching and to make it less messy.

Here we go.

>Advanced Auxillary (5 sc, 7 mo)
#Better way to change drugs properties.

>Advanced Construction Techniques (2 sc, 3 mo)
#Reduce machines purchasing price.
-lvl 0: Machine purchasing price at 90%.
-lvl 1: Machine purchasing price at 85%.
-lvl 2: Machine purchasing price at 75%.
-lvl 3: Machine purchasing price at 60%.

>Advanced Delivery (6 sc, 7 mo)
#Even better way to sell your drugs.

>Advanced Processing (3 sc, 5 mo)
#Changing more concentration in one go.

>Agglomerator (1 sc, 3 mo)
#Increase concentration by 3.
-lvl 0: Unlocks agglomerator, process cost at 35$.
-lvl 1: Process cost at 32$.
-lvl 2: Process cost at 29$.
-lvl 3: Process cost at 26$.
-lvl 4: Process cost at 23$.
-lvl 5: Process cost at 20$.

>Alternative Delivery (2 sc, 3 mo)
#More ways to sell your drugs.

>Analyzer (1 sc, 1 mo)
#Analyze max strength concentration of drugs.
-lvl 0: Unlocks analyzer, success rate at 50%.
-lvl 1: Success rate at 60%.
-lvl 2: Success rate at 75%.
-lvl 3: Success rate at 100%.

>Atomic Sequencer (15 sc, 10 mo)
#Change drugs concentration to specified level.
-lvl 0: Unlocks atomic sequencer, process cost at 80$. Final concentration: 2,10,18.
-lvl 1: Process cost at 72$.
-lvl 2: Process cost at 64$.
-lvl 3: Process cost at 56$. Final concentration: 2,6,10,14,18.
-lvl 4: Process cost at 48$.
-lvl 5: Process cost at 40$. Final concentration: 2,4,6,8,10,12,14,16,18,20.

>Autoclave (4 sc, 8 mo)
#Halves drugs concentration.
-lvl 0: Unlocks autoclave, process cost at 45$.
-lvl 1: Process cost at 40$.
-lvl 2: Process cost at 35$.
-lvl 3: Process cost at 30$.
-lvl 4: Process cost at 25$.
-lvl 5: Process cost at 20$.

>Basic Auxillary (2 sc, 3 mo)
#Basic way to change and analyze drugs properties.

>Basic Exploration (free)
#Unlocks forest expeditions.

Basic Pharma (free)
#Base of the tech tree.

>Centrifuge (5 sc, 7 mo)
#Switch effects of 2 drugs at specified slots.
-lvl 0: Unlocks centrifuge, process cost at 40$.
-lvl 1: Process cost at 36$.
-lvl 2: Process cost at 32$.
-lvl 3: Process cost at 28$.
-lvl 4: Process cost at 24$.
-lvl 5: Process cost at 20$.

>Chromatograph (7 sc. 9 mo)
#Adds 10 concentration if lower than 11, otherwise substracts 10.
-lvl 0: Unlocks chromatograph, process cost at 50$.
-lvl 1: Process cost at 45$.
-lvl 2: Process cost at 40$.
-lvl 3: Process cost at 35$.
-lvl 4: Process cost at 30$.
-lvl 5: Process cost at 25$.

>Creamer (2 sc, 3 mo)
#Transform drugs into cream and reduce side-effects strength.
-lvl 0: Unlocks creamer, reduce side-effects strength for 50%.
-lvl 1: Reduce side-effects strength for 55%.
-lvl 2: Reduce side-effects strength for 60%.
-lvl 3: Reduce side-effects strength for 65%.
-lvl 4: Reduce side-effects strength for 70%.
-lvl 5: Reduce side-effects strength for 75%.

>Cyrogenic Condensor (4 sc, 8 mo)
#Doubles drugs concentration.
-lvl 0: Unlocks cyrogenic condensor, process cost at 45$.
-lvl 1: Process cost at 40$.
-lvl 2: Process cost at 35$.
-lvl 3: Process cost at 30$.
-lvl 4: Process cost at 25$.
-lvl 5: Process cost at 20$.

>Deep Sea Exploration (8 sc, 8 mo)
#Unlocks ocean exploration.

>Desert Expeditions (2 sc, 3 mo)
#Unlocks desert expeditions.

>Dissolver (free)
#Decrease concentration by 1.
-lvl 0: Unlocks dissolver, process cost at 10$.
-lvl 1: Process cost at 9$.
-lvl 2: Process cost at 8$.
-lvl 3: Process cost at 7$.
-lvl 4: Process cost at 6$.
-lvl 5: Process cost at 5$.

>Drug Packer (2 sc, 3 mo)
#Pack identical drugs into one package.
-lvl 0: Unlocks drug packer, process cost at 8$. Packing capacity: 2.
-lvl 1: Process cost at 7$. Packing capacity: 3.
-lvl 2: Process cost at 6$. Packing capacity: 4.
-lvl 3: Process cost at 5$. Packing capacity: 5.
-lvl 4: Process cost at 4$. Packing capacity: 6.
-lvl 5: Process cost at 3$. Packing capacity: 7.

>Evaporator (free)
#Increase concentration by 1.
-lvl 0: Unlocks evaporator, process cost at 10$.
-lvl 1: Process cost at 9$.
-lvl 2: Process cost at 8$.
-lvl 3: Process cost at 7$.
-lvl 4: Process cost at 6$.
-lvl 5: Process cost at 5$.

>Experimental Processing (10 sc, 10 mo)
#Whole new way of creating drugs.

>Globalisation (4 sc, 6 mo)
#More advanced infrastructure.

>Hadron Collider (20 sc, 12 mo)
#Makes all effects active regardless of the concentration.
-lvl 0: Unlocks hadron collider, process cost at 130$.
-lvl 1: Process cost at 117$.
-lvl 2: Process cost at 104$.
-lvl 3: Process cost at 91$.
-lvl 4: Process cost at 78$.
-lvl 5: Process cost at 65$.

>Industrial Espionage (2 sc, 3 mo)
#Allows seeing your competitors progress.
-lvl 0: See competitors ingredients.
-lvl 1: See competitors research.
-lvl 2: See competitors product profit.
-lvl 3: See competitors exploration in-progress.
-lvl 4: See competitors research in-progress.
-lvl 5: See competitors patents progress.

>Ioniser (1 sc, 3 mo)
#Decrease concentration by 3.
-lvl 0: Unlocks ioniser, process cost at 35$.
-lvl 1: Process cost at 32$.
-lvl 2: Process cost at 29$.
-lvl 3: Process cost at 26$.
-lvl 4: Process cost at 23$.
-lvl 5: Process cost at 20$.

>Lobbying (6 sc, 8 mo)
#Relationship with the government.

>Multimixer (2 sc, 3 mo)
#Mix 2 ingredients together.
-lvl 0: Unlocks multimixer, process cost at 30$.
-lvl 1: Process cost at 27$.
-lvl 2: Process cost at 24$.
-lvl 3: Process cost at 21$.
-lvl 4: Process cost at 18$.
-lvl 5: Process cost at 15$.

>National Headquarters (1 sc, 2 mo)
#Basic infrastructure.

>Outsourcing (5 sc , 7 mo)
#Reduce explorers and scientists salary.
-lvl 0: Salary cost at 90%.
-lvl 1: Salary cost at 86%.
-lvl 2: Salary cost at 82%.
-lvl 3: Salary cost at 78%.
-lvl 4: Salary cost at 74%.
-lvl 5: Salary cost at 70%.

>Patents (2 sc, 4 mo)
#Allows patenting of your drugs, kicking your competitors out of the market.
-lvl 0: Patents up to cure level 1.
-lvl 1: Patents up to cure level 2.
-lvl 2: Patents up to cure level 3.
-lvl 3: Patents application speed at 120%.
-lvl 4: Patents up to cure level 5.
-lvl 5: Patents cost at 80%.

>Pill Printer (free)
#Transform drugs into a pill.
-lvl 0: Unlocks pill printer, pill bonus at 20$.
-lvl 1: Pill bonus at 23$.
-lvl 2: Pill bonus at 26$.
-lvl 3: Pill bonus at 29$.
-lvl 4: Pill bonus at 32$.
-lvl 5: Pill bonus at 35$.

>Planning Permission (2 sc, 3 mo)
#Reduce plots purchasing price.
-lvl 0: Plot purchasing price at 90%.
-lvl 1: Plot purchasing price at 80%.
-lvl 2: Plot purchasing price at 70%.
-lvl 3: Plot purchasing price at 60%.
-lvl 4: Plot purchasing price at 50%.
-lvl 5: Plot purchasing price at 40%.

>Regulatory Connections (10 sc, 8 mo)
#Adds bonus to cure rating of all drugs.
-lvl 0: Cure rating bonus at 10%. (B)
-lvl 1: Cure rating bonus at 14%. (B+)
-lvl 2: Cure rating bonus at 18%. (A)
-lvl 3: Cure rating bonus at 22%. (A+)
-lvl 4: Cure rating bonus at 26%. (S)
-lvl 5: Cure rating bonus at 30%. (S+)

>Sachet Maker (6 sc, 8 mo)
#Transform drugs into sachet. Adds bonus for each of the cures.
-lvl 0: Unlocks sachet maker, bonus per cure at 30$.
-lvl 1: Bonus per cure at 35$.
-lvl 2: Bonus per cure at 40$.
-lvl 3: Bonus per cure at 45$.
-lvl 4: Bonus per cure at 50$.
-lvl 5: Bonus per cure at 55$.

>Shaker (2 sc, 3 mo)
#Shift effects forward at specified level.
-lvl 0: Unlocks shaker, process cost at 30$. Shifting levels: 1.
-lvl 1: Process cost at 27$.
-lvl 2: Process cost at 24$.
-lvl 3: Process cost at 21$. Shifting levels: 1,2.
-lvl 4: Process cost at 18$.
-lvl 5: Process cost at 15$. Shifting levels: 1,2,3.

>Specialist Processing (6 sc, 8 mo)
#Change drugs concentration drastically.

>Subzero Training (4 sc, 7 mo)
#Unlocks arctic exploration.

>Syringe Injector (10 sc, 10 mo)
#Transform drugs into syringe. Adds strength bonus.
-lvl 0: Unlocks syringe injector, combined value bonus at 20%. Bonus strength increase at 25%.
-lvl 1: Combined value bonus at 24%. Bonus strength increase at 30%.
-lvl 2: Combined value bonus at 28%. Bonus strength increase at 35%.
-lvl 3: Combined value bonus at 32%. Bonus strength increase at 40%.
-lvl 4: Combined value bonus at 36%. Bonus strength increase at 45%.
-lvl 5: Combined value bonus at 40%. Bonus strength increase at 50%.

>Ultraviolet Curer (8 sc, 10 mo)
#Reduce drugs concentration to 1.
-lvl 0: Unlocks ultraviolet curer, process cost at 70$.
-lvl 1: Process cost at 63$.
-lvl 2: Process cost at 56$.
-lvl 3: Process cost at 49$.
-lvl 4: Process cost at 42$.
-lvl 5: Process cost at 35$.

All of the nodes in the tech tree are now listed in details.

Hope you like my guide! Hope you find it useful. Be sure to leave comments if you have suggestions! Thanks.