Here is the full list of all 27 G Prime achievements.
Collect 20 Perfect paths.
Listen to each story cut scene completely.
Complete Sector 6
Read over 100 entries in the E-Manual.
Complete Sector 5
Complete Sector 4
Collect 10 Perfect paths.
Collect over 100,000 whets of credited telemetry in a single level.
Complete Sector 3
Complete Sector 2
Complete Sector 1
Slingshot your rocket to ludicrous speed!
Slingshot your rocket to 1020 Kph
Collect a perfect SDER ping
Get Your first Perfect path in the wild.
Hit your own launch platform with a rocket.
Complete a level using exactly zero fuel.
Slingshot your rocket to 340 Kph
Slingshot your rocket to 680 Kph
Fly to the very edge of communication range and return for a successful ping.
Complete Sector 7
Complete Final Level
Collect 30 Perfect paths.
Collect 40 Perfect paths.
Collect a perfect path on all 50 campaign levels.
Use 10,000 sounding rockets in your career.
Successfully squeeze a rocket between two very tightly placed icetroids.