: Each period features unique level designs and era-specific enemies, such as Roman soldiers with shields or World War infantry with rockets.
: Players are frequently treated to a distinctive, muffled death scream every time they fall in battle—which, given the difficulty, happens often.
: The game is notoriously difficult, adhering to the "one-hit-death" arcade philosophy. Interestingly, the mid-bosses are often considered much harder than the final stage bosses because of their speed and rapid-fire projectiles.
The game centers on a simple yet ambitious premise: one or two soldiers must travel through various historical and future eras to rescue comrades held captive by bosses of that time period.
: You travel between these time periods frequently, often switching eras every few minutes after defeating mini-bosses. Mechanics: "Ikari Warriors with Time Travel"
: Levels range from the Primitive Age (filled with dinosaurs and cavemen) to the Age of Rome and the World Wars .
