: Set in 2024 at a secret research facility on Earth after a Mars-based artifact opens a portal for hostile aliens.
Standard distributions of this zip file, such as those found on Internet Archive , generally include: : The main game executable. File: corridor.7.alien.invasion.zip ...
: Introduced features advanced for its time, including proximity mapping, night vision, infrared goggles, and morphing enemies. : Set in 2024 at a secret research
: Often includes a README.TXT or manual with instructions. Technical Features & Gameplay including proximity mapping