Full list of all 25 GRIDD: Retroenhanced achievements worth 1,000 gamerscore. It takes around 6-8 hours to unlock all of the achievements on Xbox One.
You have gained a x32 multiplier
You have obtained the maximum level shield
You have gained a x24 multiplier
You have killed 100 enemies
You have collected 100 power-ups
You have accessed the Mainframe
You have defeated the Facehugger
You have hacked your first Backdoor
You have destroyed 200 yellow debris
You have made 100 bullets bounce
You have survived your first A.I. Encounter
You have destroyed your first enemy
Annihilate Mainframe defences
Complete the Arcade Mode for the first time
Complete the Arcade Mode without using any Backdoor
Obtain the maximum level weapon in Endless Mode
Access the 1st Mainframe Sector in Endless Mode
Access the 5th Mainframe Sector in Endless Mode
Access the 10th Mainframe Sector in Endless Mode
Collect 262,144 Kb in Endless Mode
Collect 524,228 Kb in Endless Mode
Collect 1,048,576 Kb in Endless Mode
Hack a Backdoor in Endless Mode
Survive at least 5 minutes in Endless Mode
Survive at least 10 minutes in Endless Mode