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