Poom is a single-player action shooter game in which players navigate through a Mars base, battling demonic entities that have emerged from a portal to Hell caused by Union Aerospace Corporation experiments. In this game, the storyline revolves around being the last human survivor on Mars, fighting to escape the infernal invasion and uncover the mysteries behind the portal. It stands out with its intense sci-fi horror theme, fast-paced combat mechanics, and the use of advanced weaponry and tactics to survive against hordes of enemies, offering a challenging and immersive experience across multiple platforms including PC, Linux, Mac, and web browsers.