Here is the full list of all 46 Isonzo achievements.
The base game contains 45 achievements, and there is 1 DLC pack containing 1 achievements.
Complete a "6th Battle of the Isonzo" offensive, participating in each battle
Kill yourself with your own planted dynamite on an objective
Win 10 matches as an Attacker
Play 12 full offensives
As an Italian, destroy the enemy Forward Post before a friendly Forward Post is built in that sector
Kill 12 enemies while under effect of the Canteen in a round
Kill 20 enemies using HMGs in one life as a Defender
Kill 15 enemies while being suppressed (shaken by artillery fire)
Reach 2000 kills
Shoot and kill an enemy with a Flare Gun
As an officer, use the whistle while being inside of a gas cloud
Win 10 matches as a Defender
Reach max level for a class
Earn all of the Gold Medals
Participate in triggering overtime
Win a match as a defender without letting the attackers progress past the first sector
Kill at least 5 enemies while inside of an enemy-controlled capture zone in one life
Headshot 5 enemies without dying
Complete a "Strafexpedition" offensive, participating in each battle
Kill a player while 75 meters or more above them
Earn 15 Bronze Medals
Earn 15 Gold Medals
Kill 50 enemies using the Officer call-ins in a match
Get a gas kill while you're inside the poisoned area yourself
Have 25 friendly casualties near command orders that are placed near objectives
Plant dynamite and destroy an Objective 3 times in a match
Earn 20 Silver Medals
Complete a "Dolomite" offensive, participating in each battle
Kill the enemy officer 5 times in a match
Get 5 kills, while bleeding severely, before you bleed out
Reach level 10 for a class
Build a Forward Post
In one life, get points for building, combat, destruction and healing
Successfully retreat as a Defender after losing the Contested Sector
Complete all achievements
Get 25 kills with a shovel or bandages
Kill 20 enemies using Mortars in one life as an Attacker
Sabotage 5 enemy barbed wires in one life
Sabotage 5 enemy Forward Posts in a match
Defuse dynamite planted on an Objective 15 times
Complete all of the Class Challenges
Kill 20 enemies that are wading in the Isonzo river
Dismember 10 enemy soldiers with a melee weapon
Blow up a bridge as a defender
Kill 5 or more players with one Mortar or Mountain gun shot
During the Ascent seasonal game mode, kill someone with a rock