GTA Wiki


11,688pages on
this wiki
Add New Page
Talk0 Share

"There's a train that's gonna make an unscheduled stop down the way. It's got a, how do you say, little somethin' somethin' onboard for you boys."
Frank Tenpenny

Catalyst is a mission in Grand Theft Auto: San Andreas, given to protagonist Carl Johnson by fellow Grove Street Families member Ryder from his home in the Grove Street cul-de-sac in Ganton.


Carl pays another visit to Ryder, who is making his own "water" (marijuana dipped in embalming fluid and then laced with PCP) after he couldn't find it buried in his own back yard. While Carl and Ryder are talking, Tenpenny and his accomplices drop by to inform the two that there will be an army munitions train passing through town shortly, and that enemy gangs such as the Ballas will attempt to rob the train.

The two immediately depart, arriving at the train only to find the Vagos have ambushed the train first and are attempting to offload munitions, while fighting the Grove Street boys. Once the Vagos are eliminated, the Ballas show up and attempt to take the train. Not wanting to lose the munitions, Carl jumps onto the train. Ryder promptly jumps into the back of his Picador, who waits with a GSF member driving behind the train, with Carl throwing some Crates to him. After acquiring a sufficient amount of munitions crates, the two are pursued by the police. They go to the nearby Pay 'n' Spray to evade the police, and drive back to Ryder's home.

Mission objectives

In order to complete the mission the player must:

  • Drive Ryder's truck to the ammo train.
  • Shoot the Vagos robbing the train.
  • Protect the train from the Ballas.
  • Climb onto the back of the train.
  • Toss the munitions boxes to Ryder.
  • Use the nearby pay 'n' spray to lose the cops.
  • Take the crates back to Grove Street.


Carl Johnson comes to Ryder's place.
Carl Hey, Ryder? What the hell you doing?
Ryder Nigga, I couldn't find that wet I buried, so I'm making my own. It's easy, fool.
Carl Oooh! That's strong. Man, don't do that! You'll sauté the both of us.
Frank Tenpenny, Eddie Pulaski, and Jimmy Hernandez enter.
Frank Tenpenny Morning boys!
Ryder Man, who you calling a boy, fool?
Frank Tenpenny What should I call you? Midget?
Eddie Pulaski How about prick?
Frank Tenpenny Prick...
Eddie Pulaski Yeah, prick works.
Ryder Man, fuck you.
Frank Tenpenny Bitch, get outta here. Mmm... Smells good. What's cooking? Where's mine?
Ryder Man, just chill out, a'ight. Move. Here. Don't be sweating me, motherfucker.
Ryder hands Tenpenny a jar that he hands off to Hernandez to hold.
Frank Tenpenny Mmm, my wife loves this stuff, man.
Eddie Pulaski *laughs*
Frank Tenpenny Anyway, there's a train gonna make an unscheduled stop just down the way. Its got a, how you say, "little something something" on board for you boys. Square business, man.
Eddie Pulaski Catch you later, homeboys.
Ryder Asshole.
Frank Tenpenny Oh Carl, try not to kill any more respected police officers. Please?
Eddie Pulaski Crime has certainly gone up since you got back, kid.
Carl Just doing my part for the community.
Frank Tenpenny Your train's gonna be there in five.
Carl and Ryder get into his Picador.
Ryder You drive, CJ, seeing as you "Mr.Driver" and all.
Carl Ugh, not your shit again. Don't give me a hard time about my driving, I ain't got the energy for it, man.
Ryder Well, don't go roll the damn car over and blow us all up in flames, then!
Carl Ah, I ain't rising to your shit now.
Ryder Good! Means you concetrate on the road then.
Carl (chuckles) You love to give your homie a hard time.
Ryder Just tryin' to keep my soldiers alive, nigga.
Carl By nagging them to death?
Ryder Watch the road, motherfucker! THE ROAD!
Carl and Ryder arrive near the train in Las Colinas, finding some GSF homies fighting Vagos for the train's cargo.
Ryder Yeah, here we go.
Carl That's our train, alright. Shit, looks like some Northside Vagos got it first!
Carl and Ryder kill all the Vagos, only to have the Ballas arrive at the scene.
Ryder Oh, what's this? We've got Ballas tryin' to crash the party?!
Carl Looks like Tenpenny told every gang in South Central!
Ryder Man, we gotta smoke those Balla assholes!
Carl and Ryder kill all the Ballas. Any GSF homies still alive will secure the area.
Ryder Go check out the train, CJ!
Carl gets on the train, when it suddenly starts moving.
Carl Damn, what is that?
Ryder Chill out, fool, we gonna be right behind you! Throw me some boxes, CJ!
Carl throws some boxes to Ryder as he stands in the back of his truck while a GSF homie drives it.
Ryder I got it!
Ryder Damn, not so hard!
Ryder Keep 'em comin'!
Carl starts throwing explosive boxes to Ryder
Ryder Shit, I nearly dropped that one!
Ryder Oh yeah!
Ryder And another one!
Ryder Can't stop me!
Carl throws the last box into Ryder's Picador and comes back to it, only to have the LSPD come after it.
Ryder OK, CJ, that's all I can carry! Hop in the car and stamp out, fool! Man, we got the one-time on our tail!
Carl and Ryder lose the cops, then go back to Ryder's home.
Ryder Damn, homie, that shit was tight!
Carl You too, homie!
Ryder LB's coming over to stash this shit.
Carl OK, later then.
Ryder For life, CJ, for life - you heard?

Video walkthroughs

PC Version
GTA San Andreas - Walkthrough - Mission 11 - Catalyst (HD)05:24

GTA San Andreas - Walkthrough - Mission 11 - Catalyst (HD)

IPad Version
GTA San Andreas - iPad Walkthrough - Mission 11 - Catalyst (HD)06:07

GTA San Andreas - iPad Walkthrough - Mission 11 - Catalyst (HD)


The reward for this mission is an increase in respect. The mission Robbing Uncle Sam is unlocked.


  • During the cutscene, Carl briefly disappears for a few seconds and reappears again when Tenpenny informs him and Ryder about the weapons train.
  • Several players experience a glitch when throwing the boxes for Ryder to catch. Instead of throwing the boxes, the boxes are instead dropped most of the time, even if the player used max power for the throw. This usually happens if the frame limiter on the player's computer is switched off.


  • The song heard in the pre-mission cutscene is "Fantastic Voyage" by Lakeside, which can also be heard on Bounce FM.
  • During the dialogue heard on the way to the train, Ryder states "Don't go roll the damn car over and blow us all up in flames!". This references the fact that in the 3D Universe, cars flipped upside-down will explode after a short period of time.
  • The mission features similar objectives to the GTA Chinatown Wars mission Stealing the Show, as both missions require the protagonist to throw crates to a moving pickup truck. 
  • If the player stops the car and gets out far enough away from the train, the player can use a Camera or a Sniper Rifle to see the GSF and Vagos standing still near the train, not doing anything. However, if the player comes close, they will open fire. 
  • Carl can throw the boxes insanely far. This is best seen when aiming towards the sky with max power. 
  • It is not at all necessary to adjust the power. The mission can be done if the target is kept on Ryder and the boxes are thrown with max power.
  • If the player jumps out of the car when reaching the train and the car stops far away from the train, Ryder will leave the car, re-enter and drive the car next to the train.
  • A GSF member and a LSV gangster can always be found as corpses when the player reaches, however they cannot be shot through.


Ad blocker interference detected!

Wikia is a free-to-use site that makes money from advertising. We have a modified experience for viewers using ad blockers

Wikia is not accessible if you’ve made further modifications. Remove the custom ad blocker rule(s) and the page will load as expected.