Here is the full list of all 68 VERSUS SQUAD achievements.
Survive for 20 waves in Tactical Mode on the Great Wall map
Reach the Master Player Rank
Survive for 18 waves in Tactical Mode on the Cellblock map
In a game kill 3 Flamer Bosses with a M2 Weapon Station
Enable manual repair mode and repair one object to 100% HP
In a game deploy one sentry gun and let it kill 666 enemies
Reach the Warlord Player Rank
Kill 2 Demolition Bosses within 60 seconds of each other
In one game, pick up 50 Fuel Bombs
In a game explode 21 flares using Payload
Survive 25 waves on the Paintball map without taking any damage from the Gatling Gun boss
Survive for 30 waves in Tactical Mode on the Prison map
In a friends on-line game reach wave 30
In one game kill 12 bosses with inventory landmines
In a game kill 3 Mortar Bosses with Grenade Sentry guns
In a game kill 100 suiciders using grenade sentries
Without taking damage, kill 1000 enemies within the first 6 minutes of a game
In a game stock handgrenades, pick only Anarchist then kill 1500 inside 10 minutes
Reach the Commander Player Rank
In one game, kill 1000 enemies using Heavy Seekers
Use the M1919 Machine Gun to kill 5 bosses during Rage powerups in one game
Pick up an AK47, get Rage Trigger + Frenzy and kill 123 enemies during Rage
During Bullet Time, kill 5 Suiciders with the Steam Hammer
In a game kill 5 Rotor Bosses while they are flying
In a game use the Jackhammer to kill 5 Demolition Bosses
In a game get damaged by 5 Flamer Boss death explosions
In one game kill 500 enemies using the M1919 Machine Gun during Bullet Time
In a game, kill 8 bosses using Claymore mines
In one game pick up 25000 coins from dead enemies
In one wave, get hit by the Gatling Gun, Rotor and Tank bosses
In Tactical Mode, in a single wave kill 3 melee bosses in a row
In a game kill 1000 enemies using shotgun sentries
In a game pick up and detonate 10 ieds
In one game survive 25 missile hits from a Rotor Boss
In a Coop game kill 2500 + 25 bosses. Kills count with your health 75%+
In a game use Cluster Bombs to kill 150 enemies
In one game, spend 10000 coins on repairs
Reach the Captain player rank
Explode 500 suicide bombers
In one game kill 100 suicide bombers using the SAIGA shotgun
In a game kill 2 bosses during a single Ghost powerup
Set up 15 simultaneously active claymore mines
In a game blow up 10 gas cannisters dropped by dead suiciders
In one game get hit by every boss type
In a SP game kill 2000 + 20 bosses. Kills count with your health 75%+
Get Wild Bunch and Strike Team and kill a Gatling Gun Boss using Ghosts
In one wave, get hit by a Mortar Boss 15x
In a game get damaged by 20 Demolition or Chainsaw Boss melee hits
For 20 minutes kill bosses only with a NailGun, others only with a Jackhammer
Kill 300 enemies in the first 3 minutes of a game
In a single wave set 400 enemies on fire using a Flame Thrower
During the building phase, destroy 5 items created by another player
In a game get damaged by 10 suiciders
In a public on-line game reach wave 20
On Campsite map survive 10 minutes without a regular enemy reaching the tent
Reach the Veteran Player Rank
In a game kill 3 Tank Bosses
Survive 20 minutes on Shipwreck without building anything
Do not use any powerups for 10 minutes
Kill 1000 enemies without taking any damage
In a single wave, kill 250 enemies using explosions
Kill 500 enemies without taking any damage
In one game, get damaged 100x by bosses
In an online coop game, revive other players 5x
In a game survive for 10 minutes without using any ranged weapon
Kill 250 enemies without taking any damage
Survive 5 minutes without killing any boss
Kill 100 enemies without taking any damage