Here is the full list of all 82 Steel Rain achievements.
Finish the hidden boss encounter in hardcore mode and max difficulty
Purchase all Wings
Purchase all upgrades
Max out one of the elite skills
Reach core level 50
Hold your first million credits
Finish all planets in hardcore mode
Finish all planets in hardcore mode and at max difficulty
Research all Technologies
Unlock and finish the boss mode
Install all bomb upgrades
Place 100+ editor objects
Finish all Planets in Max difficulty
Purchase all Drones
Install all armor uprgades
Research all technologies in a category
Build a harvester next to a trading hub
Find and kill the hidden bonus boss
Install all missile upgrades
Colonize all planets
Install all Firemode upgrades
Finish all Missions on all Planets
Complete all missions on planet 8
Complete all Missions on Planet 7
Learn all firemode skills
Research and build a steel citadel
Build 10 or more Habitats
Complete all Missions on Planet 6
Learn your first active max skill of any firemode
Finish a stage using only formation C
Complete 3+ stages in legendary mode
Complete all Missions on Planet 5
Defend a colony from attackers
Share a new created stage
Hold 100k + credits
Finish 10 Quests
Finish a S ranked colony quest
Finish a stage in hardcore mode
Hide your core and wings for a stealth attack from below
Finish Stage in max difficulty
Research 5+ Technologies
Finish a stage using only formation B
Research your first new Technologie
Visit all Hangar areas
Complete all Missions on Planet 4
10000+ Kills
Complete all Missions on Planet 3
Download a new stage from the workshop
Reach core level 10+
Visit the leaderboard area in the hangar
Shoot your main laser for 1minute overall time
Finish a stage without taking damage
Finish your first colony quest
Play all 6 firemodes in each of the 3 formations
Finish your first construction
Colonize a planet
Evade enemy lasers in open formation C, with one wing on the left and one wing on the right side of the laser.
Evade 10 enemy lasers in formation C on the same height
Install 10+ upgrades
Learn at least 1 skill of each firemode color skills
Complete all Missions on Planet 2
Destroy 20+ enemy mines in formation C
Get a drone pet
Learn your first firemode Skill
Complete all Missions on Planet 1
Use the yellow firemode to convert credit drops into repair kits (Skill required)
Reach core level 5+
Repair 100 hull points
Install first upgrade
First core level up
1000+ Kills
Finish a 100+ combo
Finish a stage using only formation A
Finish Orbit Patrol Mission
Collect 100 powerups
Reach S ranking
Finish a stage without changing the firemode color
Finish Stage 1
Finish a 20+ combo
Finish a 50+ combo
Create and share 4+ stages
Finish a boss run in hardcore mode and max difficulty