Here is the full list of all 25 Loyalty and Blood: Viktor Origins achievements.
Kill 500 enemies with boomerang weapons
Purchase all weapons
Kill 500 enemies with elemental flame weapons
Reach new game+
Complete both challenges on every mission
Kill 500 enemies with special weapons
Kill 500 enemies with charge weapons
Kill 500 enemies with spread shot weapons
Kill 500 enemies with beam weapons
Kill the Sentient Being without getting hit
Complete every mission
Kill the Dragon Wyrm without getting hit
Kill the Kraken without getting hit
Kill 50 skeletons in the "Backup Needed" mission
Kill 500 enemies with lob shot weapons
Kill 200 arachnids
Kill the Malevolent Spectre without getting hi
Kill the training dummy
Kill Anima without getting hit
Pick up 10,000 fragments
Kill 100 enemies with the melee attack
Break 500 objects
Reach bloodlust level 9
Kill 500 enemies with single shot weapons
Kill the Ta'kan leader without getting hit