Natural Selection 2 is the sequel to the popular Half-Life mod Natural Selection. It is built on our own engine and will be distributed through Valve's Steam platform.
Here is a quick look at the "Whip". This is a new upgrade structure that really has no counterpart from NS1.
The Whip is the structure that the Commander will want to build when employing a more offensive strategy. It provides Commander-researched, player-purchased upgrades which increase the amount of damage aliens can inflict upon marine players. Currently it allows Melee 1/2/3 upgrades, a Lerk upgrade called Piercing (makes sniping deadlier, adds a satisfying "crack" when firing and pins targets to the wall on death) and a Bloodthirst upgrade for Skulks (details murky, any ideas?).
As discussed previously in our Crag reveal update, each of the alien structures has a "passive" ability, "triggerable" ability, and "targeted" ability. The passive ability for the Whip is a melee attack which automatically strikes nearby enemies. Lashing out with its main tentacle body, it whips marines who happen to be within its sweeping arc, and it can do damage to more then one target at a time. When its triggerable ability is activated by the Commander, alien players and structures nearby squeal in unison and are given a short term damage boost (similar to the Lerk's Primal Scream from NS1).
For its final ability the Whip can be upgraded to a "Mature" Whip, which adds a bombard-style attack. The structure forms and grows glowing balls of acidic goo, that it coils its tentacle body tightly around, until given a command to hurl its deadly projectile at Commander selected targets. The acid ball explodes on impact and has a splash damage area effect. All the abilities use energy which replenishes over time. In addition to new abilities, mature versions of alien upgrade structures have a higher maximum energy and more health.