We're getting ready to release a stripped-down version of Natural Selection for mappers so they can better create maps. Here's the breakdown:

Non-playable, for mappers ONLY Based off of Half-life version 1108 Fully customizable particle systems New lighting and sound entities Functional "commander mode" The custom .fgd, with many new gameplay entities Over 10 megs of custom textures Many sample maps with examples of all new entities and features Will be released as separate mini-mod, it will be a 27 meg download

Once again, this build is NOT playable and not meant for most players, but is for those who want to try creating a map for Natural Selection. The release is coming soon, check back here and in the forums for more information.