Here is the full list of all 115 Hard Reset Redux achievements.
Complete all Barrens levels on difficulty Normal or higher
Complete all Barrens levels on difficulty Hard or higher
Complete all Barrens levels on difficulty Insane
Destroy the Overseer on difficulty Normal or higher
Destroy the Overseer on difficulty Hard or higher
Destroy the Overseer on difficulty Insane
Destroy the Overseer on difficulty Easy or higher
Buy all CLN Firearm Upgrades
Use the hydraulic presses to crush all 9 Gorilla-bots on the Factory level on difficulty Normal or higher
Use the hydraulic presses to crush all 9 Gorilla-bots on the Factory level on difficulty Hard or higher
Use the hydraulic presses to crush all 9 Gorilla-bots on the Factory level on difficulty Insane
Use the hydraulic presses to crush all 9 Gorilla-bots on the Factory level on difficulty Easy or higher
Kill 20 enemies within 15 seconds on difficulty Easy or higher
Kill 20 enemies within 15 seconds on difficulty Normal or higher
Kill 20 enemies within 15 seconds on difficulty Hard or higher
Kill 20 enemies within 15 seconds on difficulty Insane
Kill 200 enemies using environmental damage only
Kill a Heavy Scarab on difficulty Easy or higher
Kill a Heavy Scarab on difficulty Normal or higher
Kill a Heavy Scarab on difficulty Hard or higher
Kill a Heavy Scarab on difficulty Insane
Kill a Heavy Scarab within 20 seconds on difficulty Easy or higher
Kill a Heavy Scarab within 20 seconds on difficulty Normal or higher
Kill a Heavy Scarab within 20 seconds on difficulty Hard or higher
Kill a Heavy Scarab within 20 seconds on difficulty Insane
Destroy 2 CLN Gunships within 20 seconds on difficulty Easy or higher
Destroy 2 CLN Gunships within 20 seconds on difficulty Normal or higher
Destroy 2 CLN Gunships within 20 seconds on difficulty Hard or higher
Destroy 2 CLN Gunships within 20 seconds on difficulty Insane
Destroy a CLN Gunship within 5 seconds on difficulty Easy or higher
Destroy a CLN Gunship within 5 seconds on difficulty Normal or higher
Destroy a CLN Gunship within 5 seconds on difficulty Hard or higher
Destroy a CLN Gunship within 5 seconds on difficulty Insane
Kill 2 Gorillas within 20 seconds on difficulty Easy or higher Easy or higher
Kill 2 Gorillas within 20 seconds on difficulty Normal or higher
Kill 2 Gorillas within 20 seconds on difficulty Hard or higher
Kill 2 Gorillas within 20 seconds on difficulty Insane
Kill a Gorilla within 5 seconds on difficulty Normal or higher
Kill a Gorilla within 5 seconds on difficulty Hard or higher
Kill a Gorilla within 5 seconds on difficulty Insane
Kill a Gorilla within 5 seconds on difficulty Easy or higher
Kill a Heavy Grenadier within 30 seconds on difficulty Normal or higher
Kill a Heavy Grenadier within 30 seconds on difficulty Hard or higher
Kill a Heavy Grenadier within 30 seconds on difficulty Insane
Kill a Heavy Grenadier within 30 seconds on difficulty Easy or higher
Complete all Bezoar levels on difficulty Normal or higher
Complete all Bezoar levels on difficulty Hard or higher
Complete all Bezoar levels on difficulty Insane
Destroy the 'Shrimp' Construction Machine on difficulty Easy or higher
Destroy the 'Shrimp' Construction Machine on difficulty Normal or higher
Destroy the 'Shrimp' Construction Machine on difficulty Hard or higher
Destroy the 'Shrimp' Construction Machine on difficulty Insane
Collect 20 full N.A.N.O. bars
Find 25 secrets
Kill 1000 enemies
Destroy 20 CCTV cameras
Destroy the Atlas on difficulty Normal or higher
Destroy the Atlas on difficulty Hard or higher
Destroy the Atlas on difficulty Insane
Destroy the Atlas on difficulty Easy or higher
Kill 50 enemies with electricity only
Complete any other level than the first one with no deaths on difficulty Normal
Complete any other level than the first one with no deaths on difficulty Hard
Complete any other level than the first one with no deaths on difficulty Insane
Collect 10 full N.A.N.O. bars
Destroy the Caul-Dron on difficulty Easy or higher
Destroy the Caul-Dron on difficulty Normal or higher
Destroy the Caul-Dron on difficulty Hard or higher
Destroy the Caul-Dron on difficulty Insane
Kill a Heavy Grenadier on difficulty Normal or higher
Kill a Heavy Grenadier on difficulty Hard or higher
Kill a Heavy Grenadier on difficulty Insane
Kill a Heavy Grenadier on difficulty Easy or higher
Kill 5 enemies with one shot on difficulty Normal or higher
Kill 5 enemies with one shot on difficulty Hard or higher
Kill 5 enemies with one shot on difficulty Insane
Kill 5 enemies with one shot on difficulty Easy or higher
Blow up 50 explosive barrels
Destroy 500 destructible items
Find 5 secrets
Kill 10 enemies within 10 seconds on difficulty
Kill 10 enemies within 10 seconds on difficulty Normal or higher
Kill 10 enemies within 10 seconds on difficulty Hard or higher
Kill 10 enemies within 10 seconds on difficulty Insane
Kill 100 enemies
Destroy 50 destructible items
Kill 20 enemies using environmental damage only
Buy all N.R.G. Weapon Upgrades
Buy all Combat Gear Upgrades
Kill 10 enemies with one shot on difficulty Easy or higher
Kill 10 enemies with one shot on difficulty Normal or higher
Kill 10 enemies with one shot on difficulty Hard or higher
Kill 10 enemies with one shot on difficulty Insane
Kill 10000 enemies
Kill 2000 enemies using environmental damage only
Destroy 5000 destructible items
Find all the secrets in Bezoar
Kill 30 enemies within 20 seconds on difficulty Easy or higher
Kill 30 enemies within 20 seconds on difficulty Normal or higher
Kill 30 enemies within 20 seconds on difficulty Hard or higher
Kill 30 enemies within 20 seconds on difficulty Insane
Kill 20 enemies with one shot on difficulty Easy or higher
Kill 20 enemies with one shot on difficulty Normal or higher
Kill 20 enemies with one shot on difficulty Hard or higher
Kill 20 enemies with one shot on difficulty Insane
Shoot down a Zeppelin
Unlock all achievements
Blow up 30 fussion cells
Use the blowers to destroy all 20 Bird-bots on the Crusher level on difficulty Easy or higher
Use the blowers to destroy all 20 Bird-bots on the Crusher level on difficulty Normal or higher
Use the blowers to destroy all 20 Bird-bots on the Crusher level on difficulty Hard or higher
Use the blowers to destroy all 20 Bird-bots on the Crusher level on difficulty Insane
Find all the secrets in Barrens
Complete all Bezoar and Barrens levels in Heroic mode
Collect 41 full N.A.N.O. bars