Climbing Over
Climbing over objects would be a great addition. Move up to the object, and when a picture appears in the lower mid section of your monitor, indicating an action is avilable for use, you hit your use key. Now, the marine engages in the action. If its a five foot high wall, theres no reason for him not to be able to get over it just because he cant jump over it. He shoulders his weapon, and hops up, grabbing the ledge, and pulling himself up. Thats just an example of an animation that could play for something like that. Now, onto my next idea that ties in with this one.
Shimying
Shimying! You can once again, hop up onto a five foot wall. Now, while your hanging by one hand, you have three options:
-Drop off
-Pull up
-Shimy (move to the sides while your still dangling if you dont know what it means)
Should you choose to shimy, you can now move the marine side to side along the ledge. This can be used to get on tiny struts of terrain that arent big enough to climb up top on, but shimy across on. Now, while your shimying, you have the following options:
-Drop off
-Pull up
-Unholster your weapon
Unholstering your weapon, awsome! Now, the marine anchors his feet against the wall, removes one hand from the wall, and unholsters his weapon (after you choose it from your HUD) only if its a light machine gun, or pistol, which gives an advantage to having the basic weapons, they're much more versatile and able to be used in tight situations. The marine is now holding his light machine gun/pistol in one hand, and can aim with it. While the marine's weapon is unholstered, he can not move, besides aiming, of course. However, the marine can always have his pistol out as he shimys, but must remain stationary if he is to shoot.
Ladders
I think we all know ladder animations.. well, there arent any. So while we're working on this, add some in! A marine comes up to a ladder object, he presses use once hes indicated that there is an action to the ladder, and he holsters his weapon, once again moving up the ladder. Now, he can only shoot in a shimy mode style, holding his pistol as he climbs the ladder, just like in shimy mode as well, and he cant climb or move around when his weapon is unholstered, just like shimy. This idea is just really a nice piece of polish for the game, or future versions.
Crawling
Yes, this is a prone suggestion. This would allow the marine to go into a crawling postion, and access tight spots. Also, crawling allows the mapper to create these tight spots, or more realistic vents. The skulk/gorge/lerk would have to be altered to fit in these little areas, so a mode for the alien would just to be to stretch himself out a bit, allowing him to fit (IE, spread his limbs to the side so he can go low enough). The marine could also not turn around in vents unless he comes into a more open area. The alien, however, can turn around as he pleases, making the vents his natural home, and very easy to manuver around in, unlike the marine, so entering vents would really be a large deathtrap, and only a last minute resort, as well as a very atmospheric and scary trip. Is he behind you?
Some Final, Nitpicking Requests!
Fix the flashlight to be like "The Specialists" mod flashlight (no longer a big light ball around you, but the flashlight actually shines where you shine it for other players too, leaving you in the dark!), add detail textures, and make the marines have lasers on their helmets for atmospheric purposes only, as the aliens couldnt see the lasers. It would just look cool.
Hope you all liked and agreed with my idea.
Note: Zun, if this isnt possible
in the HL engine, at least
save it (if you think its good,
hopefully!) in the "for future
versions" section, because this
might be ported to other engines
where it is possible. However,
I'm quite sure this is possible in
Half-Life, Flayra has prooved a lot
is possible that we dont think is.