Walkthrough Achievements
Note: You must complete the game to get all these achievements. This guide will help you!
Extended Testing Opportunity
Finish every test chamber in Chapter #1.
Food And Artificial Sunlight
Finish every test chamber in Chapter #2.
Post-Insignificance
Finish every test chamber in Chapter #3.
Official Pre-Admittance
Finish every test chamber in Chapter #4.
Full Chief Custodian Candidate
Finish every test chamber in Chapter #5.
Spectacularly Lonely
Finish every test chamber in Chapter #6.
Convoy Achievements
66% Loss
20 Convoys delivered.
66% Delivery
40 Convoys delivered.
0% Non-Delivery
60 Convoys delivered.
Portal Achievements
For Science!
1,000 Portal Transitions.
For More Science!
5,000 Portal Transitions.
Misc. Achievements
Centrifugal Convoy Adjustment System
Passed through the same portal 15 times.
Entry-Exit Relay Repeater System
30 times back and forth through the same portal.
Aerial Mobility Support System
Bounced 25 times on the repulsion gel with the same vehicle.
No Hard Feelings
First turret decomissioned.
You Monster
100 Test Vehicles destroyed.
Source: https://gameplay.tips/guides/1742-bridge-constructor-portal.html