Doom Episode One, Shareware Version 1.25 Released in 1994 by Id Software/Sybex Inc DOOM Episode One Shareware version - Companion Disk for The Official DOOM Survivor's Strategies & Secrets ISBN 1546-2. 1994 Sybex Inc. This is a rare Version 1.25 created by Sybex. It is basically 1.2 with a newer sound support library.