challenging obstacle: they move along the top of the screen in a flock and if shot at or flown into will disperse into individual birds. Flying into a bird causes the plane to crash. Sopwith 2 adds the ability to play multiplayer over an async serial interface, but a BMB dictionary driver (NAMEDEV.SYS) and a BMB serial communications driver (SERIAL.SYS or SERWORK.SYS) are needed. Following the source code release, SDL Sopwith was written as a C port/rewrite of Sopwith 2: The Author's Edition written in 2001 by Simon Howard. It uses the Simple DirectMedia Layer library and preserves the CGA graphics of the original. See also Triplane Turmoil, a 1996 VGA Freeware remake References External links Homepage of the author, David L. Clark SDL Sopwith source code Sopwith fan site 1984 video games Horizontally scrolling shooters SDL Sopwith World War I video games Linux games Open-source video games DOS games Formerly proprietary software Video games developed in Canada Multiplayer and single-player video games