This is a analysis of the map ns_veil with regards to chokepoints. Please note, that this is *not* a full-fledged strategy, and that chokepoints are dependant on the map and not on a specific style of play. Some strategies will use one, some or all of the chokepoints described and some strategies won't. Please also note, that this is not meant to list all the important places on the map - only the places crucial tomoving through and fortifying the map.
I have chosen to make it from the marine viewpoint, but the points are equally important to the kharaa.
First, an overview of the map. The chokepoints I have identified are marked with a green circle with a letter in it. Each of the chokepoints is described in detail further down.
I presume that marines occupy and hold the marine spawn and that the entrances to Pod 1 and 2 from marine spawn are welded early and rendered impassable.Chokepoint A
The first chokepoint is not that far from the marine spawn. It does not provide any extra resources, nd as such it is not an investment that will repay itself to fortify this point. It does however have some value, if the aliens are very lerk-intensive, as it will protect the marine base from spore attacks. I will however only recommend fortifying this point if it is absolutely impossible to get to point B.Chokepoint B
This point is close to point A, but it has some definate advantages. If defended sufficiently it will both protect your base from lerks (like chokepoint A) *and* secure the Skylights resource node. There is a pretty long corridor to protect (West Junction), which makes it a good spot to place a turretfarm. Remember to cover the corridor that enters West Junction from the south, or risk a lerk to spike your turrets or turret factory to death. Please notice that if aliens hold Subsector 5 B, there is a relatively short route to this point, and you can expect quite a lot of rush activity - especially if you do not also posess chokepoint C.Chokepoint C
Here is another multi-purpose point. First of all, it can secure another resource node, Overlook, which will slowly return your investment. Second it is an excellent spot to keep the Subsector hive down from. If you intend to build sieges there, make sure to build them close enough to the hive, so they can actuelly reach.
Here too is a long corridor to defend, which can be covered by turrets. (Remember to build an observatory there too, to avoid sensory traps - I know I said this wouldn't be strategy, but I see this error way too often).
Together with chokepoint B, this point is one of the most important places to hold on the western part of the map. The two points together effectively secure 2 resources and one side of the marine base.Chokepoints D and E
These two points should always be taken together, if they are to hold optimal alue. If chokepoint D is taken alone, the aliens will use the vent between the two points to get past it. If chokepoint E is taken alone, the aliens can waltz right past your defenses to the north.
The points D and E effectively split the map in two parts. In one part you find Subsector hive with it's resource node, Overlook and Skylights, and in the other part you find the two other hives, 4 resource nodes and the double resource node. Since the latter can be sieged from the marine spawn, it doesn't really count to the aliens.
If marines successfully fortify these points, they will find them selv in a very advantagous position. It should be very possible to clear the side of the map from which the aliens are excluded, since they can recieve no backup there.
It might also be possible to siege Cargo hive from chokepoint E, but I haven't actually tested that. If aliens posess Cargo, it will *not* be easy to hold point E, and it will definately need marine backup and preferably phasegates.
Chokepoint E can be combined with several other points to form powerful combinations of great strategic value. I will examine these at the chokepoints in question.Chokepoints F and G
Here is another example of two chokepoints, that needs to be taken together. Furthermore they should preferably be taken in combination with either chokepoint E or a fortification of the Cargo hive. If marines succeed in taking and holding these points, aliens will either be trapped in Cargo and Pipeline or excluded from these hives. It is most effective if aliens start in Subsector hive, otherwise it will be close to impossible to defend the three points.
Together with chokepoint H the points G and F can defend all of the eastern part of the map. That means that marines secure the Topographical and C-12 resource nodes and gets the base defended from spore attacks.
Notice that both of these points are hard to defend - especially if aliens have two hives. It is always difficult to cover vents with static defenses, and bilebombs can diminish a base in a minute. Mines are not much help against 2 hive gorges, as their bile bomb can set off mines from a distance.
I do not recommend anyone trying to hold these points except in combination with chokepoint E if the aliens start in Subsector hive. In that case it can be an effective means of controlling alien expansion and secure a swift marine win.Chokepoint H
This point is another of the crucial places on the map. On it's own it will secure the Topographical resource and protect the marine base from lerks, but it also severely hinders alien movement in that part of the map. It will make it much more difficult for aliens to attack Nanogrid, should the marines have fortified this position.
In combination with other points on the map, chokepoint H will really do a difference. Together with chkepoint E it splits the map in two parts, which no matter where the aliens are, will be an advantage to marines. In one part of the map there is 5 resource nozzles, a hive and the double res. In the other part there is 2 hives but only three resources. If aliens are in the first part, they can get no more than one type of upgrades and hive one abilities, and if they are in part two, they will be starved of res so that advanced evolution will come at a later time and they will have problems affording to defend their hive.
Chokepoint H can also be effective together with chokepoint B in protecting the marine base and securing three resource nozzles. This will maintain a steady resflow, even if things begin to get ugly elsewhere on the map.
It must be mentioned, that chokepoint H can be very difficult to hold. It must be heavily fortified because it can be attacked from several sides at the same time. It is a relatively large room, but there are a lot of corners to hide behind and many angles to cover. Still, I think it is one of the most important points for the marines to control from the beginning of the game.Chokepoint I
This point has about the same strategical value as chokepoint B. It will secure a resource nozzle, Topographical, for the marine team, and it will protect the base from spore attacks. It is worth taking, but generally I would recommend going for chokepoint H instead, if the commander can spare the res to properly defend it. Chokepoint I is good for marines to capture early in the game.
Please note that this is not a complete strategi on how to play veil as marines. It is only meant as a walk-through of the strategically important places for logistics on the map - and the Kharaa should take notice of these as well.