The Twins

The Twins are a bike/weapon that is classified as a bike, despite it also replacing the weapon slot with a minigun.

When you equip The Twins, the weapon selection button will be locked, and will be replaced with a image of The Twins.

You can't select the weapons slot with the Twins.

You also can't change the color of the bike (it is army green with flames painted on the sidecar).

The minigun comes with 50 bullets and despite the fact that you inspect the stats directly, it seems that is it a weaker version of the "Vera the Shooter" in terms of damage.

The bike however has the following stats:

Speed: 5

Mass: 10

Control: 5

It can't be upgraded. The Twins was purchasable with real money in the Chillingo version, but in the rereleased version, it can be buyable with coins. Only the "Kill 100 Soldier Zombies to unlock The Twins!" remained the same in the two versions.