Full list of all 26 Bridge Constructor Portal achievements worth 1,170 gamerscore.
The base game contains 16 achievements worth 1,000 Gamerscore, and there is 1 DLC pack containing 10 achievements worth 170 Gamerscore.
40 convoys delivered
Finish every test chamber in Chapter 4
Finish every test chamber in Chapter 3
1,000 Portal Transitions
Passed through the same portal 15 times
100 Test Vehicles destroyed
30 times back and forth through the same portal
20 convoys delivered
Finish every test chamber in Chapter 2
Bounced 25 times on the repulsion gel with the same vehicle
First turret decommissioned
Finish every test chamber in Chapter 1
Finish every test chamber in Chapter 5
Finish every test chamber in Chapter 6
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
10 times tried to start a test run with an uncorrectly placed portal.
Maximum amount of portals successfully used in a test run.
First job for the Condolence Letter Delivery Fleet provided.
50 test vehicles destroyed in "Portal Proficiency"