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S.Y.S is a pwad file for the registered version of DOOM from ID Software.
S.Y.S is a pwad file for the registered version of DOOM from ID Software. To play S.Y.S., first copy sys.wad and sys.bat to your DOOM directory. Then change to the DOOM directory and type SYS. SYS.wad was created using DOOMCAD by Matthew Tagliaferri. Roger Scudder CIS 74563,1610