In regards to animations, the current team doesn't have any dedicated animators. So we've had to make do with what's within our range of skill. I'll admit a lot of the animations are borrowed from KF it's self. Don't worry, they'll be no aliens walking like clots though.
A lot of the aliens are on all fours as opposed upright, the aliens average in at 6'-7'. Which if stood upright puts them taller than the player.
We currently have 4 crawling, 3 walking. Not including the facehugger, chestburster and queen.
To date I think that the animations in the AvP2010 game had the aliens moving right. But to replicate that is just uneconomic for a mod in this engine. We are limited by what the engine gives us and by what cleaver coding Marco can work in. And trust me, he's already worked in some bloody impressive alien mechanics so far. They can scale and run along walls and ceilings, mappers can add wall paths for aliens, facehuggers getting you and impregnating you. etc etc.
Take it from someone who knows, don't get hung up on details. If we did this mod would never be released because we would never think it was right. We are hoping to produce something people will have fun with. Let the likes of Gearbox with their time and money worry about getting it right. (Which so far looks like they are still messing up. Ironsights on top of the pulse rifle and red dots on motion tracker anyone? pfft)