GTA Vice City Cabmageddon Walkthrough

Survive the taxi ambush in Cabmageddon, then defeat the Zebra Cab. Keep moving around the yard instead of getting trapped between several attackers.

Purchase the associated business after Shakedown to access its jobs. Finish earlier missions in that business chain where required.

Mission walkthrough

Drive to the supposed pickup

Take the Kaufman cab to the marked meeting point and sound the horn. The expected fare is a setup. Position the car with room to accelerate before the rival taxis begin their attack.
Survive the countdown

Drive broad loops around the open yard and let the attackers collide with each other. Avoid the corners, where several taxis can pin your car against a wall. Change direction only when there is a clear opening, not when the whole pack is beside you.
Keep the cab away from chain explosions

If another taxi starts burning, steer away rather than using it as a barrier. An explosion can cripple an otherwise healthy car. Focus on surviving the full timer instead of trying to destroy every attacker immediately.
Defeat the leader

Once the Zebra Cab appears, follow the new target and damage it from a position where you can still escape a collision. Finish the leader when the opportunity appears. Winning completes the Kaufman asset and unlocks the Zebra Cab at the business.

The first stage is a survival test. Do not spend the whole countdown stationary, trading impacts with five cars at once.