Alejandro Guerra has an almost savant-like talent for counting and memorization, a skill he put to use in various gambling houses where he won big at poker and blackjack tables. However, fortune is fickle, and after racking up massive debts and angering some important people, he had to get out. Vegas joined the IAF so he could earn the money to pay back his debts (or a sizeable seed fund with which to win back the rest), and to get away from people who want to crush his kneecaps.
- "4 to 1, eh? I like these odds."
- "Wanna play a little game?"
- "¡ADIOS, muchachos!"
- "Hack complete! What did I win?"
- "Sweet! Tequila, here I come."
- "SynUp Cola. Anyone got any cred?"
- "¡Ten cuidado, bastardo!"
- "Time to roll the dice, compadre..."
- Vegas is a new character that debuted in Alien Swarm Source, he was created in the Alien Swarm: Infested Beta on the Source engine. He replaces Gareth Flynn from Alien Swarm 2K4, and is of a slightly higher rank despite lower age.
- Both Crash and Vegas seem to share a like for SynUp Cola and will sometimes refer to it when passing it's vending machine in Syntek Residential. If there is a nearby medic - either Faith or Bastille - they will express their hatred of SynUp Cola, with Faith occasionally pointing out that it is addictive.
- Vegas' nickname is an allusion to his previous lifestyle as a gambler.
- Vegas was actually created back in 2006 for Alien Swarm: Infested an updated of the original Alien Swarm 2K4 mod, built on the Source engine. He debuted on December 8th 2006 in a post by Cythe one of the Black Cat devs.
- "He's cool! He's a charmer! He's a tech with facial hair! Good with a gun, and formidable with a deck of cards... A whiz with the slots, and a real ladies man And always has an ace up his sleeve... From south of the border..."