Full list of all 26 Bridge Constructor Portal achievements. It takes around 15-20 hours to unlock all of the achievements in the base game on Windows.
The base game contains 16 achievements, and there is 1 DLC pack containing 10 achievements.
Finish every test chamber in Chapter 3
1,000 Portal Transitions
100 Test Vehicles destroyed
Passed through the same portal 15 times
20 Convoys delivered
Finish every test chamber in Chapter 2
30 times back and forth through the same portal
Bounced 25 times on the repulsion gel with the same vehicle
First turret decomissioned
Finish every test chamber in Chapter 1
Finish every test chamber in Chapter 4
Finish every test chamber in Chapter 5
Finish every test chamber in Chapter 6
40 Convoys delivered
60 Convoys delivered
5,000 Portal Transitions
Finish every test chamber in Chapter 1 of "Portal Proficiency".
Finish every test chamber in Chapter 2 of "Portal Proficiency".
Finish every test chamber in Chapter 3 of "Portal Proficiency".
10 convoys delivered in the Portal Proficiency initiative
20 convoys delivered in the Portal Proficiency initiative
30 convoys delivered in the Portal Proficiency initiative
Maximum amount of portals successfully used in a test run.