Doom Order: Mission Critical

Doom Order: Mission Critical is the 4th Doom Order game, and the first story focused one since the original. It's new enemies, weapons, and overall gameplay was loved by fans after the backlash that was caused because Doom Order 3 and Doom Order 2 were multiplayer only games. This is also the first Doom Order game to be released on a console, so it was a lot of people's first experience with the series.

The game was made by the original RCI (with Doom Order 3 being made by RCI Blue) who learned from their mistakes in making Doom Order 2. This new game has both multiplayer and single player, but the game seems to put more focus on the single player.

Story Summary
The story takes place 3 months after the end of the original game, where our two main characters escaped Hellworld and made it into the wasteland that is the universe.

Chapter I: Mission Critical
Chapter one sees the duo in their new 3D forms as they escape Hellworld. The game then skips to 3 months later where the duo are stranded. Suddenly, a new type of enemy, the Wrecker, invade. Lisa and Chris work together to kill all of the Wreckers, and successfully save themselves. However, the ship was damaged in the process, and the duo need to land on a nearby rock plane to scavenge for parts. However, zombies infected by the mysterious X-Virus attack them when the duo are underground. The chapter ends when Lisa seemingly sacrifices herself to save Chris.

Chapter II: All By Yourself
The next chapter follows Chris as he mourns, Lisa and continues to repair the ship. He is invaded multiple times by more zombies and wreckers, but is able to hold them off. Suddenly, a new enemy appears on the rock plane, a Korg. The Korg invade and overrun the ship, and Chris is unable to do anything to stop it. Chris is then left to fend off the hordes of zombies and Korgs by himself. After killing over half of the enemies on the rock, most of them go into hiding. Later, Chris spots an alien ship piloted by Super Soldiers. He then sneaks onto it as the chapter ends.

Chapter III: Raze Hell
Chapter three follows Chris as ne fights his way through waves of Super Soldiers, Stalkers, Hellhounds and more in the spaceship. Eventually, he encounters the first boss of the game, The Executioner, a deformed underling of the Surgeon. The Executioner is slow but packs a punch when he hits the player. It's just you and the Executioner in the Surgeons chamber. Eventually, you kill the Executioner but the Butcher (another undlering of the Surgeon) enters the room and knocks you out as the chapter ends. Chapter 3 of Mission Critical is a fan favorite because of it's intense industrial atmosphere and memorable boss fight and ending.

Chapter IV: Lambs to the Slaughter
Chapter four starts with Chris being tested by the Surgeon. When the Surgeon leaves to get results of the testing, Chris escapes and finds a captured Lisa who is held captive by two Super Stalkers. Chris barely survives and kills the Super Stalkers, saving Lisa in the process. He then meets Zoe, the person who helped the Surgeon make a deal with Ace Williams for Hell Energy. Chris initially doesn't trust Zoe, but learns to when it's found out that Zoe was forced to make the deal. The three then fight more waves of enemies till they meet with the Butcher and are trapped in a battle with him. The Butcher sadly kills Lisa in the battle by shooting her, axing her in the face, then hanging her on a meathook. However, Zoe and Chris are able to finally defeat the Butcher, and escape, but not before a dying Lisa gives them a bomb they can use to kill the Surgeon. Lisa then dies as the chapter ends.

Chapter V: Living Dead
Chapter 5 starts off with Zoe and Chris being captured by a Super Stalker X. They then are placed in front of the only remaining demons on the ship, The Surgeon, the Super Stalker X, two Super Soldiers, and Ace Williams. Chris and Ace talk until Ace orders Zoe to be killed. The Surgeon then drags Zoe away as Ace continues to talk to Chris. Ace then pulls out two Ultra Chargers, upgrades that can be used on demons to make them super powerful. Ace then uses them on the Super Soldiers. The two Super Soldiers become stronger as Ace and the Super Stalker X leave the room. Chris fights and eventually kills both of the upgraded Super Soldiers, but is wounded in the process. He then tries to leave after seeing Zoe dead and the Surgeon gone, but he has to fight the final boss of the game: the Super Stalker X. After a long and tense battle, Chris gets the upper hand and plants the bomb Lisa gave him on the SSX. The upgraded Stalker then explodes, killing him. The game ends with a final cutscene showing the Surgeon and Ace escaping the ship in an escape pod.

Public Reception
Fans and critics alike loved the accessible nature of Mission Critical due to that fact it was released on PlayStation 2. They also loved that this new game took a story approach to the series and the continuation of the Doom Order (1995) story.

Financial Information
Most financial info isn't known besides the fact the game sold around 500,000 copies in the first seven days. The game possibly sold an estimated 2 million copies.