Characters

The marines are the playable characters in Alien Swarm. They all have different skill sets based on their class that differentiate between each marine. Additionally there are some non-playable characters ingame too.

Playable Characters[]

In the Source versions of Alien Swarm there are 8 playable IAF marines in 4 classes and 2 NPCs:

Officers[]

The Officer uses Officer Skills, and applies damage and defense buffs to nearby squadmates. They are harder to kill than most marines.

Special Weapons[]

The Special Weapons marine uses Special Weapons Skills and has a higher overall damage capability. They are good at mowing down swarms.

Medics[]

The Medic uses Medic Skills, and has access to a variety of mass or singular healing tools to heal friendly marines and counter infestations from parasites.

Techs[]

The Technical Specialist uses Tech Skills, and can hack security consoles. They are necessary for the completion of most missions.

Non-Player Characters[]

Alien Swarm 2010 Notes[]

Born from an cancelled sequel - named Infested - for the 2k4 mod, a few things were recycled back then.

Vegas, which was planned to make his first appearance in Infested.
Textures for marines from the 2k4 sequel can be found in the game files, which include textures for all classes + 2 textures for an unique female marine model.

Alien Swarm 2K4 Notes[]

In the original Unreal Tournament 2004 mod some things were different.

Officers were Explosives marines
Special Weapons were Special Weapons Marines
Medics were Medical Officers
Technical Specialists were Technical Marines.
IAF was named ISAF.
The Allied Systems from the original game later became one half of the Interstellar Alliance alongside the Core Systems.
All characters remain the same in the Valve version, except for Flynn who was replaced by Vegas.
In the original game, Williams was a black Android.