The original Doom game was released by id Software, marking a significant milestone in first-person shooter video games.
The Ultimate Doom, an enhanced version of the original Doom featuring an additional episode called 'Thy Flesh Consumed', was released by id Software.
id Software released the source code of Doom, allowing the gaming community to create mods and ports, which significantly extended the game's lifespan and influence.
Union Aerospace Corporation (UAC) detects unusual readings and transmissions from the research base on Phobos, prompting investigation.
UAC sends a team of space marines to investigate the base on Phobos following loss of communication and suspicious activities.
Marines encounter hostile demonic entities inside the Phobos base, confirming the presence of interdimensional invaders.
Marine operative fights through increasingly hostile environments and demonic creatures within the base's secret experimental quarter.
UAC's teleportation experiment on the Mars moon Phobos inadvertently opens a portal to Hell, unleashing demonic forces.
Marine forces successfully destroy the compromised sections of the Phobos base to contain the demonic outbreak.
Following Phobos incident, marines are dispatched to Deimos to investigate and contain similar disturbances present there.
Marines uncover a demonic portal beneath the Deimos base, necessitating further containment measures.
Marine forces fight through the Deimos base infested with demonic creatures to destroy the infernal portal and experiment facilities.
Marines breach the portal and enter the Hell dimension itself to eradicate the source of the invasion and close the gates.
The marine successfully closes the portal from the Hell dimension, halting the invasion and preventing further demonic incursions.
