Each of the weapons' firing modes can be further upgraded using weapon tokens, but they can only be maxed out by completing a challenge related to that particular firing mode.
Runes transport the player to a separate arena to perform a combat challenge that grants different abilities when successfully completed, such as better equipment drops from fallen enemies.
It was the second best-selling video game in North America and the UK a few weeks after its release, and sold over 500,000 copies for PCs within the same time period.
A sequel titled Doom Eternal was announced at E3 2018 for Nintendo Switch, Microsoft Windows, Play Station 4, Xbox One and Google Stadia and will be released in November 2019.
Mick Gordon composed the music for the game, with additional music contributed by Ben F. Players take the role of an unnamed space marine as he battles demonic forces from Hell that have been unleashed by the Union Aerospace Corporation on a future-set colonized planet Mars.
The gameplay returns to a faster pace with more open-ended levels, closer to the first two games than the slower survival horror approach of Doom 3.
Doom is a first-person shooter video game developed by id Software and published by Bethesda Softworks.
Weapon points come from field drones and allow the player to unlock alternate modes of fire for many weapons, such as explosive shots and different rate and output of firepower.
The game features a large arsenal of weapons which can be collected and freely switched by players throughout the game and require no reloading.
Recurring weapons of the series also make a return, including the super shotgun and BFG 9000.
Players can also upgrade their "Praetor Suit" by retrieving special tokens from dead marines and using them to improve functionality such as equipment, navigation and resistances.
Additionally, each of the game's levels contains a hidden lever which opens an area extracted from a classic level in the original Doom or Doom II.
Retribution allows players to track their last killer by showing their health and location, while Power Seeker guides players to the power weapon pickup in the game.