- Series: C.A.D.S. Series Record # 6550
- C.A.D.S.
- 1 C.A.D.S. (1985) by Jan Stacy and Ryder Syvertsen [only as by John Sievert]
- 2 Tech Battleground (1986) by Ryder Syvertsen [only as by John Sievert]
- 3 Tech Commando (1986) by Ryder Syvertsen [only as by John Sievert]
- 4 Tech Strike Force (1987) by Ryder Syvertsen [only as by John Sievert]
- 5 Tech Satan (1988) by Ryder Syvertsen [only as by John Sievert]
- 6 Tech Inferno (1988) by Ryder Syvertsen [only as by John Sievert]
- 7 Doom Commander (1989) by Ryder Syvertsen [only as by John Sievert]
- 8 Cybertech Killing Zone (1989) by Ryder Syvertsen [only as by John Sievert]
- 9 Suicide Attack (1990) by David Alexander [only as by John Sievert]
- 10 Recon by Fire (1990) by David Alexander [only as by John Sievert]
- 11 Death Zone Attack (1991) by David Alexander [only as by John Sievert]
- 12 Tech Assassins (1991) by David Alexander [only as by John Sievert]