We've finished with the canonical Marathon Trilogy and are moving on to third party scenarios, starting with EVIL. In this scenario, a UESC ship from Tau Ceti runs into a spatial anomaly that sends them far away where we encounter something dark and evil.

Blackstar and Narcogen are teleported into the very heart of Mystic Pfhor civilization, and tasked with infecting something with a computer virus. However, a fiendish puzzle of mindbending proportions awaits them, the nature of which they can as yet neither perceive nor comprehend...

EVIL can be played, like the other Marathon games, using the open source Aleph One engine which you can get here for Windows, Mac and Linux:

http://source.bungie.org

EVIL and other third party scenarios for the Aleph One engine can be downloaded here:

http://source.bungie.org/scenarios.php#more

We use irons' Co-Op script, which gives weapons and ammo to both players if either picks any up, and prevents weapon loss on death (so items can't be destroyed in lava or slime). The script also allows one player to teleport to a destination set by themselves or their partner, in case co-op players run into a problem a solo player would have to restart for.

http://simplici7y.com/items/co-op

EVIL has its own spoiler guide:

http://marathon.bungie.org/spoiler/evil/

Subscribe to the Narcogen's YouTube channel for Anger, Sadness and Envy video podcasts:

http://www.youtube.com/playlist?list=PLIof4Cp3-cam7bAFzDEwK_wzSSEya050i

Subscribe to the iTunes channel or RSS feed for shorts and audio podcasts:

https://itunes.apple.com/us/podcast/anger-sadness-and-envy/id266991411?mt=2

http://feeds.feedburner.com/AngerSadnessEnvy

Music used in this episode:

"What About Bob?" by Alexander Seropian, remixed by Craig Hardgrove (intro music)
"New Pacific (Reprise)" by Alexander Seropian, remixed by Craig Hardgrove (outro music)

Marathon,Marathon Infinity (Video Game),Bungie,Bungie Studios (Organization),Cooperative Gameplay (Gameplay Mode),Cooperative Game (Game Genre),Let's Play