Marathon Infinity is a captivating first-person shooter that builds on the narrative of its predecessors, introducing a complex storyline involving time paradoxes. Originally launched for Mac in 1999 and later adapted for Windows, this installment enhances the gaming experience with advanced graphics and a longer campaign. Players can explore the game through high-resolution and widescreen formats, making it visually appealing on modern systems.

The game features customizable graphics and controls, allowing players to tailor their experience. A notable addition is the small machine gun, which expands the arsenal available to players. As they navigate through the game, terminals reveal crucial story elements and transport players to various moments across time and space, enriching the overall gameplay experience.