But then I realize, even though that monster looks pretty cool, there's no way it's going to move like a real monsters might. I've yet to see a Q3 Engine game with realistic movement code... Jedi-Knight 2 is probably the game closest to come to decent movement code, and even after a while, you start to notice how the player models look like one solid chunk of pre-modelled geometry, and not a body with components that move independantly... and this is with Ghoul technology. JK2 did a decent job with model movement, don't get me wrong, but it's still a long way from perfect.
So, I'm looking at that screenshot, and I'm thinking "Whoa! That thing looks tight!", but then I realize it's probably just one solid piece of pre-modeled geometry... and how, when it turns, it's not going to look like a real alien... it's gonna look like some geometry being rotated around the Y-axis. :( Its tail won't slither along the floor, or if it's coming down some stairs, its tail will simply clip through a the stairs, instead of resting on them.
Maybe it's a limitation with technology... but I'd really like to see some games with better model geometry.