Time Crisis is a first-person on-rails light gun shooter series of arcade video games by Namco, introduced in 1995. It is focused on the exploits of a fictional international intelligence agency who assigns its best agents to deal with a major threat by a hostile organisation, which has ranged from criminals, terrorists and hostile military outfits, and mostly take place within fictional locations across the world. The arcade series differed from other light gun shooters of its time by incorporating unique mechanics, including the ability to duck into cover to dodge attacks and reload the player's weapon, and forcing players to complete battles in each level within an allotted amount of time. Over time, the series developed to incorporate additional features of gameplay, including two-player co-operative modes on arcade machines, the ability to use additional weapons in combat, and dealing with dangerous events. Alongside arcade machines, the series was also developed for consoles, beginning with a port of the first installment to PlayStation consoles in 1995, with all ported versions of arcade titles featuring additional content and game mechanics, such as additional stages, and different difficulty modes. Alongside the main games in the series, it also has spawned a number of spin-off titles that incorporate the cover mechanics and time limit gameplay elements, but with notable differences in combat situations and organisations involved in each game's story and levels.