Here is the full list of all 74 INFRA achievements.
Complete INFRA.
Complete the chapter "Redemption".
Help Carla and Amit.
Complete the chapter "To Save a City".
Win the jackpot on the slot machine.
Photograph 50% of all the photographable spots in Act 3 during the same playthrough.
Complete the chapter "Late for a Meeting".
Photograph 25% of all the photographable spots in Act 3 during the same playthrough.
Break into the battery store.
That's a lot of money.
Turn on the generators at Hammer Valley Dam and succesfully connect the plant to the grid.
At the Hammer Valley Dam, get across the generator room without moving the boxes.
At the Hammer Valley Dam, toss the elevator fuse into the slot from the upper end of the stairs.
At the office, jump down from the 8th or 7th floor.
Save Robin's life.
Leave Robin to his fate.
Complete the chapter "Working Overtime".
Complete INFRA: Part 2.
Photograph 50% of all the photographable spots in Part 2 during the same playthrough.
Complete the chapter "Public Transport".
Photograph 25% of all the photographable spots in Part 2 during the same playthrough.
Complete the chapter "Fresh Water".
Complete INFRA: Part 1.
Photograph 50% of all the photographable spots in Part 1.
Grab the USB stick from the Hacker Den.
Fix all the problems at the Pitheath Water Treatment Plant.
Eat the kebab roll at the Pitheath Water Treatment Plant.
Analyze a water sample at the Pitheath Water Treatment Plant.
Complete the chapter "Heavy Industry of the Past".
Find the lost dock.
Complete the chapter "Forgotten World".
Make your own tunnel in the Bergmann water tunnels.
Photograph 25% of all the photographable spots in Part 1.
Experience the Osmo effect.
Fix the problems at the pumping station and get back underground without disrupting the operation.
Complete the chapter "Just Another Day at Work".
Complete the chapter "Preparations".
Photograph 90% of all the photographable spots in Part 1.
Uncover 90% of all the corruption tapes and documents in Part 1.
Find 90% of all the hidden geocaches in Part 1.
Repair 90% of all the repairable spots in Part 1.
Repair all the water flow meters in Part 1.
Get through the Hacker Den without triggering any of the alarms.
???
Photograph 90% of all the photographable spots in Part 2 during the same playthrough.
Uncover 90% of all the corruption tapes and documents in Part 2 during the same playthrough.
Find 90% of all the hidden geocaches in Part 2 during the same playthrough.
Repair 90% of all the repairable spots in Part 2 during the same playthrough.
Supply the city with fresh water.
Photograph 90% of all the photographable spots in Act 3 during the same playthrough.
Uncover 90% of all the corruption tapes and documents in Act 3 during the same playthrough.
Find 90% of all the hidden geocaches in Act 3 during the same playthrough.
Repair 90% of all the repairable spots in Act 3 during the same playthrough.