Here is the full list of all 86 Survivor Squad: Gauntlets achievements.
Reach Level 10
Defuse the bomb, Gauntlet: Material Gathering
Get 200 kills with a Sutler
Kill 1000 Infected
Get 200 kills with a Vendetta
Get 100 kills with a Gordon
Kill 500 Infected
Find the hidden Eveys, Gauntlet: Brock and Dave
Reach Level 5
Open the cells, Gauntlet: Brock and Dave
Read the bloody love letter, Gauntlet: Brock and Dave
Complete a Gauntlet Achievement
Kill 200 Infected
Finish a Gauntlet
Kill 50 Infected
Play 5 Gauntlets
Play 10 Gauntlets
Play 20 Gauntlets
Get 10 Bronze Stars of better
Get 5 Gold Stars or better
Get a Platinum Star
Publish a Gauntlet
Get 5 Speedy Achievements
Get 5 Untouchable Achievements
Beat a Gauntlet with 0 damage taken
Beat a Gauntlet in under 60 seconds
Reach Level 20
Reach Level 50
Publish a Gauntlet containing 10 Events
Visit Endless Loop Studios Facebook
Visit Endless Loop Studios Twitter
Post your score on Twitter
Post your score on Facebook
Build a Gauntlet with 2 Sentry Guns
Place 50 Events
Place 20 LEDs
Beat 5 Challenges
Beat 10 Challenges
Beat 20 Challenges
Get a Platinum star on your first try
Open the drawer, Gauntlet: Tutorial
Light up the LED, Gauntlet: Tutorial
Activate the Electric Door, Gauntlet: Tutorial
Turn on the Machine, Gauntlet: Grabber Machine
Get trapped, Gauntlet: Trailer Gauntlet
Equip all Survivors with Eveys, Gauntlet: Trailer Gauntlet
Get the code right on the first try, Gauntlet: Darkness
Read all the research logs, Gauntlet: Darkness
Get past the lasers without taking damage, Gauntlet: Darkness
Equip all Armory weapons within 45 seconds of opening it, Gauntlet: Snow Outpost
Take no damage before opening the Armory, Gauntlet: Snow Outpost
Follow the lights in less than 2 minutes, Gauntlet: Snow Outpost
Get 150 kills with a Creedy
Get 500 kills with a Finch
Get 1000 kills with a Evey
Clear 10 Daily Challenges
DONT DEAD OPEN INSIDE, Gauntlet: The Great Escape
Find the super-secret-not-so-secret area, Gauntlet: The Great Escape
Get past the laser gates in 30 seconds, Gauntlet: The Great Escape
Found the Secret Room, Gauntlet: The Great Escape Lite
Open the Gate on the first try, Gauntlet: The Great Escape Lite
Take no damage while running towards the Sentry Guns, Gauntlet: The Great Escape Lite
Participated in the Early Access. Also unlocks if you have all other achievements so you can get 100%
Find the neighbours Dascomb, Gauntlet: Mike and Kenny
Navigate the lasers without being hit, Gauntlet: Material Gathering
Use the Sonar 10 times, Gauntlet: Material Gathering
Survive the first Poison Fog without taking damage, Gauntlet: Base Building
Deploy all Gadgets, Gauntlet: Base Building
Break 2 Cement Bags into Bricks within 2 seconds, Gauntlet: Base Building
Find the Red Key, Gauntlet: Routine Scavenging
Survive until the last day, Gauntlet: Routine Scavenging
Train a Survivor to the max, Gauntlet: Routine Scavenging
Beat Editor Challenge 7
Beat Editor Challenge 20
Get over 10 score, Gauntlet: Flappy Survivor
Found the Mysterious Vial, Gauntlet: Desert Survival
Kill 500 Infected, Gauntlet: Weapon Achievement Gauntlet
Call in 5 Air Strikes, Gauntlet: Survivors Vs Zombies
REALLY?! We just arrived here!, Gauntlet: Safe Haven
Dude can you wake u-- Never mind. Stay dead!, Gauntlet: Safe Haven
Wait! You found the Red Key?! Better collect your prize..., Gauntlet: Safe Haven
Deploy 2 Sentry Guns, Gauntlet: The Complex
Get everything on max level, Gauntlet: The Arena
Craft 6 weapons, Gauntlet: The Arena
Deal more than 150 damage to Survivors in the first 90 seconds, Gauntlet: Infected Mastermind
Loot every container, Gauntlet: Daily Scavengers