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