N.B. MEGA SWIV (aka FIREPOWER 2000) for Mega Drive/Genesis and SUPER SWIV for SNES are console games very different in design to SWIV, released initially for 8/16-bit computer platforms only.
Rarity:
One version is common, at least one other version is rare
Notes:
[1] Game design by Ned Langman, Ronald Pieket Weeserik and Dan Marchant. Coding by Ronald Pieket Weeserik and John Croudy. Graphics by Ned Langman. Music by Andrew Barnabas.
[2] SWIV was The Sales Curve's spiritual successor / unofficial sequel to Tecmo's 1988 coin-op SILKWORM.
[3] SWIV = Special Weapons Interdiction Vehicles / Secret Weapons Installation Verification / SILKWORM IV