Monkey Business is a storyline mission in Grand Theft Auto V, picked up in Cape Catfish, Blaine County (Start), Humane Labs and Research, San Chianski Mountain Range, Sandy Shores Airfield and La Fuente Blanca, Senora Road (End) for Steve Haines. The objective: stealing a neurotoxin from Humane Labs and Research and transporting it away. This GTA 5 Monkey Business walkthrough covers every step, the reward, and what makes the job fail.
Key facts
- Location: Cape Catfish, Blaine County (Start), Humane Labs and Research, San Chianski Mountain Range, Sandy Shores Airfield and La Fuente Blanca, Senora Road (End).
- Given by: Steve Haines.
- Objective: Stealing a neurotoxin from Humane Labs and Research and transporting it away.
- Reward: Michael has his Tailgater returned (with modifications), Michael and Trevor can freely re-enter Los Santos, Pistol.50 and Heavy Shotgun available in Ammu-Nation and Stun Gun available in Ammu-Nation (If The Civil Border Patrol has not been completed yet).
- Unlocks: Hang Ten.
- Unlocked by: Derailed.
GTA 5 Monkey Business walkthrough
- Navigate down the coast line. (Michael).
- Gain entry to the lab. (Michael).
- Go to the elevator. (Michael).
- Use the stun gun to incapacitate the scientist. (Michael).
- Pick up the security card.
- Incapacitate the lab workers. (Michael).
- Take cover from the security guards. (Michael).
- Get the nerve toxin.
- Take out the security guards. (Michael).
- Put the nerve toxin into the refrigeration unit. (Michael).
- Collect the container. (Trevor).
- Fly to the airfield. (Trevor).
- Land the crate on the trailer. (Trevor).
- Land the helicopter. (Trevor).
- Drive Patricia to the farm house. (Trevor).
How GTA 5 Monkey Business fails
The mission fails if you get Wasted or Busted, or if any of the following happens:
- Dave and Steve were abandoned.
- Dave died.
- Steve died.
- The boat was destroyed.
- The boat is stuck.
- You abandoned the mission.
- The oxy-hydro cutter ran out of fuel.
- Michael’s cover was blown.
- The refrigeration unit was destroyed.
- The chopper was destroyed.
- The helicopter was abandoned.
- The nerve agent was damaged.
- The truck was destroyed.
- Trevor’s truck was destroyed.
- Trevor’s truck is stuck.
- Patricia died.
- Patricia was abandoned.
- You spooked Madrazo’s men.
- Using a gun before you get inside the lab.
- Taser runs out of charge.
Tips
- Save before you start. GTA 5 missions lock you in until you pass or fail, so a fresh save makes retrying painless.
- Protect the vehicle or crew member the mission depends on — losing it fails the job even if you are still alive.
- Want every mission in Los Santos? See all GTA 5 missions.
- Looking for shortcuts instead? See our GTA 5 cheat codes.
Video walkthrough
Prefer to watch? This video shows it in action.
FAQ
How do you start GTA 5 Monkey Business?
Pick it up in Cape Catfish, Blaine County (Start), Humane Labs and Research, San Chianski Mountain Range, Sandy Shores Airfield and La Fuente Blanca, Senora Road (End) for Steve Haines.
What do you get for completing GTA 5 Monkey Business?
Michael has his Tailgater returned (with modifications), Michael and Trevor can freely re-enter Los Santos, Pistol.50 and Heavy Shotgun available in Ammu-Nation and Stun Gun available in Ammu-Nation (If The Civil Border Patrol has not been completed yet).
What fails GTA 5 Monkey Business?
Getting Wasted or Busted. It also fails if: Dave and Steve were abandoned; Dave died; Steve died; the boat was destroyed; the boat is stuck; you abandoned the mission; the oxy-hydro cutter ran out of fuel; Michael’s cover was blown; the refrigeration unit was destroyed; the chopper was destroyed; the helicopter was abandoned; the nerve agent was damaged; the truck was destroyed; Trevor’s truck was destroyed; Trevor’s truck is stuck; Patricia died; Patricia was abandoned; you spooked Madrazo’s men; Using a gun before you get inside the lab; Taser runs out of charge.
What does GTA 5 Monkey Business unlock?
Which version of GTA 5 is this walkthrough for?
The objectives, location and reward are the same across the PS5, PS4, Xbox Series, Xbox One and PC releases of GTA V, aside from minor control differences.
