Tech tree is confusing and the units are locked behind both science unlock and a ranking tier of three red, orange, blue. the tiers are so confusing and randomly given within in the tech tree. red 12 would be half the science tree and other side missions. that's right side mission in a land defense rpg... blue harmony is butch of xeno discoveries.
red = purity human combatant
blue = harmony bio warfare weaponry
orange = force / savage? robotics weaponry

i select quick and still takes 8 hours to max out science which lets you max out all 3 tiers. the tiers unlock from combination of missions, science unlocks, relics. espionage allows you to steal knowledge also. (espionage is amazing and broken at the same time)

Tech tree is confusing and the units are locked behind both science unlock and a ranking tier of three red, orange, blue. the tiers are so confusing and randomly given within in the tech tree. red 12 would be half the science tree and other side missions. that's right side mission in a land defense rpg... blue harmony is butch of xeno discoveries. red = purity human combatant blue = harmony bio warfare weaponry orange = force / savage? robotics weaponry i select quick and still takes 8 hours to max out science which lets you max out all 3 tiers. the tiers unlock from combination of missions, science unlocks, relics. espionage allows you to steal knowledge also. (espionage is amazing and broken at the same time)