RabidFrog

Midway

Air-walk between the start and the end!

Combo Killer!

Get combo kills until you reach 200

Combo Master!

Get combo kills until you reach 1000

Harvesting

Find the first easter egg

The Heist

Find the second easter egg

Earth & Void

Find the third easter egg

Doomed Space Marine

Find the fourth easter egg

Do it like Jones

It was better in the movie

Serious Pickup

Seriously?! That's what I got?

Daniel the Traveler

A fun cross achievement with: http://store.steampowered.com/app/252210/

Desert Zone...

...is far away from the Green Hill Zone

Pyramid of Fear

Enter and exit the Pyramid of Fear

Temple of the Sun

Complete the Temple campaign

Survivalist

Survive the castle collapsing

Full House

Beat both the Castle Hammerwatch and the Temple of the Sun campaigns

Worse than Ghost and Goblins

Fail, where they fail: http://www.youtube.com/watch?v=-IAVCdu_DDs#t=467

The Grisly Combination

Solve it like it was E1M4

The Hard Queen

Kill the Queen on hard difficulty without having any crutches enabled

The Hard Knight

Kill the Knight on hard difficulty without having any crutches enabled

The Hard Lich

Kill the Lich on hard difficulty without having any crutches enabled

The Hard Dragon

Kill the Dragon on hard difficulty without having any crutches enabled

The Hard Dune Sharks

Kill the Dune Sharks on hard difficulty without having any crutches enabled

The Hard Frost Sorcerer

Kill Krilith on hard difficulty without having any crutches enabled

The Hard Sun Guardian

Kill Sha'Rand on hard difficulty without having any crutches enabled

Hard Crystal Lich

Kill the Crystal Lich in the survival level on hard difficulty without having any crutches enabled

Mass murder

Kill 2,500 enemies in the campaign

Massacre

Kill 25,000 enemies in the campaign

Genocide

Kill 250,000 enemies in the campaign

The Queen

Kill the Queen on medium difficulty without having any crutches enabled

The Knight

Kill the Knight on medium difficulty without having any crutches enabled

The Lich

Kill the Lich on medium difficulty without having any crutches enabled

The Dragon

Kill the Dragon on medium difficulty without having any crutches enabled

The Dune Sharks

Kill the Dune Sharks on medium difficulty without having any crutches enabled

The Frost Sorcerer

Kill Krilith on medium difficulty without having any crutches enabled

The Sun Guardian

Kill Sha'Rand on medium difficulty without having any crutches enabled

Crystal Lich

Kill the Crystal Lich in the survival level on medium difficulty without having any crutches enabled

Affluent

Get 10,000 coins in the campaign

Rich

Get 100,000 coins in the campaign

Millionaire

Get 1,000,000 coins in the campaign

Xmas 2013