Here is the full list of all 14 Neon Chrome achievements.
Upgrade a stat to level 100.
Kill 3 enemies with a single railgun bullet.
Finish a normal level without being seen.
Kill 8 enemies with a single explosive.
Finish a normal level in under 20 seconds.
Finish a normal level without using abilities, weapons or melee.
Stop the Overseer 1.0.
Play 20 levels without dying.
Defeat the hovertank.
Defeat the centipede.
Defeat the spiderbot.
Kill 1000 enemies.
Complete all special levels.
Unlock all unlockables.