When playing the Steam version of the game, the following achievements can be unlocked:

Acceptable Host

Complete the campaign in Expert Plus mode.

Ant Society

Complete the campaign in Experienced mode.

Attention to Detail

Loot every Corporate Safe in a facility.

Contact Re-established

Survive for 24 hours of in-game time.

Corporate Ladder

Survive for 10 days of in-game time in Endless mode.

Daemon Code

Complete the campaign using Faust and Brimstone as your starting programs.

Empire Builder †

Survive for 20 days of in-game time in Endless mode.

Fully Equipped

Unlock all unlockable content.

Ghost Moves

Complete a mission without being seen by any guard or camera.

Invisible Inc

Complete the campaign on Expert mode.

Meta-Hacking

Spoiler (click to show) Edit the game's source code to specifically unlock this achievement.

Meat Machine

Install 4 augments on any single agent.

Nearing Confidence Threshold

Survive for 48 hours of in-game time.

Never Look Back

Complete the campaign in Expert Plus Iron Man mode.

Powerful Toast †

Complete the extended campaign in Experienced mode.

Rebuilding the Firm

Survive for 5 days of in-game time in Endless mode.

Smooth Operator

Survive for 5 days of in-game time in Endless Plus mode.

"Surprised" Face †

Complete the extended campaign in Expert Plus mode.

Target Resolved

Survive for 72 hours of in-game time.

Technical MacGuffin †

Complete the extended campaign in Expert mode.

Time Attack

Complete the campaign in Time Attack mode.

The Limit

Complete a mission after reaching alarm level 6, in Expert mode.

Training Wheels

Complete the campaign in Beginner mode.

† Only available when playing with the Contingency Plan DLC