Here is the full list of all 20 2084 achievements.
Kill 50 TV heads.
Hack 50 times.
Kill 100 nanophage zombies.
Hack 25 times.
Kill 50 nanophage zombies.
Hack 10 times.
Hack without a single mistake 10 times in a row.
Hack 5 different objects.
Kill the Strongarm.
Distract Janus.
Overcharge your weapon.
Destroy the Generator.
Kill 200 nanophage zombies.
Kill 100 TV heads.
Kill nanophage champion.
Kill 5 nanophage champions.
Hack 8 digit code in less than 2 seconds.
Destroy 10 enemies with one grenade launcher shot.
Decipher the message
Finish the game under XXX minutes.