In Quake II, the setting is one from science fiction. 

In "Operation Alien Overlord," a desperate attempt to stop an alien invasion of Earth by conducting a pre-emptive attack against the hostile Strogg civilization's home planet, the player assumes the role of a Marine named Bitterman. 

Most other soldiers are killed or captured as soon as they reach the designated landing area. 

Bitterman is still alive because they clashed with another Marine when he launched his capsule and crashed far from the landing zone. 

The Strogg leader, the Makron, is ultimately assassinated by Bitterman in his orbital asteroid base after he battles his way through the Strogg metropolis, destroying tactical landmarks. Warriors who once fought the Arena alone must now band together. Players can check out more sequels.  

• Quake
• Quake II
• Quake IV
• Quake IIIarena
• Quake champions

Key Features

• In the first-person shooter Quake II, the player controls the main character and engages in the enemy shooting. 
• While the player's movement speed has been slowed down, and the player can now crouch, the gameplay is quite similar to that seen in Quake regarding movement and controls. 
• The Shotgun, Super Shotgun, Grenade Launcher, and Rocket Launcher are the four of the eight weapons from Quake that are still in the Game, despite having undergone aesthetic changes and functional modifications.
• The Axe, Nailgun, Super Nailgun, and Thunderbolt are the only remaining four of Quake's eight weapons absent from Quake II. 
• The six newly introduced weapons are the Blaster, Machine Gun, Chain Gun, Hyperblaster, Railgun, and BFG10K. 
• Quake II has additional powerups like the Ammo Pack, Invulnerability, Bandolier, Enviro-Suit, Rebreather, and Silencer, in addition to the Quad Damage Power-up from Quake.
• There are some Quake-related adjustments in the single-player Game. 
• The player is first given mission-based goals related to the plot, such as calling down an airstrike on a bunker and snatching the head of a Tank Commander to open a door. 
• Although they are all essentially the same little piece of film showing a computerized image of The player's character advances through the Game's Game's stages, CGI cutscenes are used to depict the player's progress through the primary objectives. 
• The player character's captured allies are a non-hostile character type, another addition. 
• However, these characters can't be interacted with, as their Strogg captors have all driven them insane.
• Compared to Quake, the Game's levels are significantly higher and include a lot more open space. 
• Switching between levels via the hub system is necessary to achieve various objectives.
• The Game's visuals and symbols share many similarities with some of those in Quake. 
• After being damaged, enemies show signs of wounds.