Hello folks!

The game has 16 achievements (12 from the original game and 4 from DLC)

All of them are pretty easy to get, except some tough. To get some achievements you need to play on hardcore difficulty. Enjoy!

Goody Two Shoes
Bring 20 Prisoners
to the Church in single player


Description: Well, it is an easy achievement. All you need is to collect prisoners. But don't go fast through the main quest. After quest with mortars you wont be able to collect prisoners. So gather them even if the timer is started (you can ignore the timer till 1 minute left for sure)

Airborne
Pilot a helicopter
in single player


Description: Story related. So you wont skip it.

A Mess of Stiff Staff Sergeants
Kill Inferno's Sergeants
in single player


Description: Kill all sergeants. Nothing difficult.

Jonesing for Relics
Return all the Relics
to the Museum in single player


Description: Grab all relics. Watch on the mini-map and that's all. Nothing difficult.

From Cold Dead Hands
Steal all Inferno's Weapon Crates
in single player


Description: This one is similar to the achievement from the first mission. At first grab weapon crates that haven't got main objective nearby.

Nothing Interesting.

Supply Problems
Destroy all Mining Carts
in the Kaabe Mountains in single player


Description: Nothing Difficult.

Mega Kill Combo
Get a 50x Damage Streak
in single player


Description: You need to do this one on Hard difficulty to obtain next achievement. Actually, pretty easy to do, but it requires some practice.
To the first crane you must have 17 damage streak
To the second crane you must have 33 damage streak
To the third crane you must have 50 damage streak

Use fast cars (like Roxy or Gordon or Blazemo)

video to help:

Or you may get easy x50+ Damage Streak and next achievement in the Mission 2 from DLC.

Lord Master of Great Skill
Get "Skill Level - Alien"
in single player


Description: To obtain this you need to get about x30 Damage Streak or better.
Notice this:

Originally posted by Osama |DK|:

Lord Master of Great Skill requires that you get the skill level: Alien at the end of the mission.

Nothing Interesting

Inferno's Briefs
Steal all the Document Briefs
in single player


Description: Nothing Difficult.

To Hell and Back
Complete Mission 9 on any Difficulty
in single player


Description: Nothing difficult except the boss. He is quite difficult. Just avid rockets.

Tough Stuff
Complete all missions
on Hardcore Difficulty


Description: You need to complete only missions from the original game! DLC doesn't count.

Extraction
Mission 1 - Rescue all the civilians
(Coldstrike DLC required)
[in single player]

Description: Nothing difficult.

Naughty or Nice
Receive a present from Santa Claus
(Coldstrike DLC required)
[in single player]

Description: Well... he will be somewhere. Shoot at Santa to get his present. Here is screenshots.

Intelligence
Mission 2 - Acquire all intel on Coldstrikes's plans
(Coldstrike DLC required)
[in single player]

Description: Nothing difficult

Mega Kill Combo
Get a 50x Damage Streak
in single player


Description: Alternative way to get this achevement and reach x130 Damage Streak

watch video (from 16:40):

Pansy Worm
Mission 3 - Defeat the Panzer Wyrm
(Coldstrike DLC required)
[in single player]

Description: Just kill the Boss.

The Daily Grind
Get a character to max level

Description: Reach 45 level. It is quite easy, especially if you going to do long Damage Streaks