Here is the full list of all 78 Caliber achievements.
Receive an Assault Operator
Complete Prologue: Support
Complete Prologue: Medic
Receive a Medic Operator
Complete Prologue: Assault
Complete Prologue: Marksman
Reach Account Level 10
Reach Account Level 20
Reach Account Level 30
Reach Account Level 40
Reach Account Level 50
Reach Account Level 60
Reach Account Level 70
Reach Account Level 80
Reach Account Level 90
Reach Account Level 100
Receive a Support Operator
Receive a Marksman Operator
Complete all Daily Objectives
Complete a Weekly Objective
Kill 100 bots
Kill 1000 bots
Kill 10 000 bots
Kill 50 Chemists
Kill 100 Marksman bots
Kill 100 Assault bots
Kill 30 Support officers
Kill 30 Medic bots
Kill 20 Sergeants
Kill 10 Heavy Fighters
Collect all Vympel collection operators
Collect all Alpha collection operators
Collect all SSO collection operators
Collect all 22 SpN collection operators
Collect all GROM collection operators
Collect all KSK collection operators
Collect all SEAL collection operators
Collect all TFB collection operators
Collect all RAID collection operators
Collect all Nesher collection operators
Collect all EZAPAC collection operators
Collect all Arystan collection operators
Collect all SSO RB collection operators
Collect all AMF collection operators
Collect all Jiaolong collection operators
Collect all CST collection operators
Collect all BOPE collection operators
Obtain 1 000 000 Credits
Obtain 10 000 000 Credits
Obtain 1 000 000 000 Credits
Play 100 rounds in Point Sweep mode
Play 100 rounds in Showdown mode
Play 100 rounds in Annihilation mode
Play 100 rounds in Onslaught: Veteran mode
Play 100 rounds in Onslaught: Legend mode
Play 100 rounds in Frontline mode
Play 100 rounds in Special Operation mode
Win 100 rounds in Annihilation mode
Win 100 rounds in Showdown mode
Win 100 rounds in Special Operation mode
Win 100 rounds in Onslaught: Legend mode
Win 100 rounds in Onslaught: Veteran mode
Win 100 rounds in Frontline mode
Win in 100 Ranked Battles
Win 100 rounds in Point Sweep mode
Heal 100 000 HP
Over the course of a single round, deal damage with all your weapons and apply any negative effect (bleeding, burning or poisoned)
Use an emote 5000 times
Execute an enemy player 1000 times
Obtain operators from 15 different collections
Obtain 5 Operators in each role
Destroy 50 devices
Blow up 100 enemy vehicles
Kill a Heavy Fighter with the last round of your secondary weapon
Kill the enemy with a smoke or a flashbang grenade
Reach Prestige level 100
Destroy 100 enemy mines
Collect all SAS collection operators