The ReDeMpTiOn SiNbot page has the version 0.6 beta of this artificial intelligence playmate for Sin. Thanks fernando guerra. The new release has been re-written with the Sin 1.03 source code release. Here's a list of what's new:

• Changed bot accuracy formula again
• Added coloured highlight text for the centerprint
• Added b_arena CVAR [0/1] to make bots attack ONLY humans! This sets b_autoskill by default too...
• Finally fixed bot bodies lying around in mid-air bug.
• Put node system back in. Navigation is not perfect yet, but we'll get there.
• Added ladder nodes
• Made level up message an external file (arcade)
• Taught bots to hunt enemies
• Camper hunting AI in place (30 second delay)