Here is the full list of all 50 Arcadegeddon achievements.
Customize a Weapon
Stack 3 of the same hacks
Defeat the Data Daemon Prince Boss
Defeat a boss with a melee attack as the final hit
Win 1 PVP Matches
Play through a Run of Adventure Mode
Defeat the FFC CEO Boss
Use a Surge Guantlet Ability
Equip a Plugin
Customize Your Surge Gauntlet Abilities
Complete the Tutorial
Customize Your Characters Appearance
Play 25 Runs of Adventure Mode
Play 100 Runs of Adventure Mode
Defeat The FFC Mech Boss
Defeat the Fury Boss
Defeat all 4 bosses in a single run
Destroy 500 Crates
Open 500 Treasure Chests
Collect 51 Figurines
Continue a Run 10 times
Use Surge Abilities 100 times
Collect 10 Figurines
Collect 100000 Tickets
Collect 500000 Tickets
Win 10 PVP Matches
Win 25 PVP Matches
Defeat 25 Bosses
Pick up 100 Health boxes
Heal teammates for 3000 hitpoints
Revive yourself using the Medic Drone
Help 50 downed teammates up
Get 500 Kills with Militech Weapons
Get 500 Kills with Nanotech Weapons
Get 500 Kills with ZeroCool Weapons
Get 500 Kills with Surge Weapons
Get 500 Kills with Infernal Weapons
Get 500 Kills with Demolisher Weapons
Get 500 Kills with each manufacturer type
Get 100 Headshots with sniper rifles
Heal a full team of 4 with the Medic Drone
Freeze 10 enemies with a single Freeze Blast Ability
Kill 20 enemies while boosted by a single Shield Drone Ability
Kill 10 enemies using a single Major Tombot
Trap 15 enemies with a single Black Hole
Kill 15 enemies with a single Fireball
Kill 20 enemies with a single Pluggernaut Ability
Have a single Tiny Tornado get frozen, electrified and set on fire
Pay to Increase the Difficulty 50 times
Unlock all Primary Surge Abilities