In response to Germany’s growing militarization, the French Navy launched a new program in 1937 to develop torpedo boats for mass production. Two boats were laid down within this program: VTB-11 and VTB-12. Both were built in Saint-Nazaire by Loire, the company that constructed the earlier experimental boats, VTB-8, VTB-9 and VTB-10. Neither boat was completed before the outbreak of World War II and when France fell in 1940, VTB-11 and VTB-12 were taken to the United Kingdom without torpedo armament. VTB-12 was upgraded by July and renamed MGB 99, and it remained in service until April 1945, when it was written off as a “total loss” for unspecified reasons.

The VTB-12 was introduced in Update 2.45 "Hornet's Sting". The main difference between the VTB-11 and the VTB-12 is that the VTB-12 has large-caliber 13.2 mm Hotchkiss machine guns instead of rifle-caliber machine guns. Otherwise, it is the same fast boat with weak armaments consisting of just two machine guns. Its torpedoes are weak but sufficient to sink a torpedo boat or subchaser.