Getting Started With Halo Reach, an Overview of Halo Reach Loadout, Enemies, and Allies
With the loadout of a DMR, plasma pistol, and sprint, you can easily kill every enemy type in the Halo Reach campaign. In almost all missions, you can easily find these weapons because 7.62×39 ammo DMRs are located throughout each map, many enemies drop plasma pistols, and you usually start with sprint. When you cannot find a DMR, you can use the same techniques with a magnum or needle rifle.
A headshot with the DMR, magnum, and needle rifle impart infinite damage on any enemy without shields or a helmet. This is very useful because no matter how much health the enemy has, a single headshot will kill them, so these same strategies work on all difficulties and skull combinations. For enemies with helmets, shoot their helmet until it pops off, and then you can kill them with a single headshot. For enemies with shields, use an overcharged plasma pistol to remove their shields and then a single headshot to kill them.
Brutes and Hunters are the only two enemies that the DMR/plasma pistol combination cannot easily kill. If you have enough DMR ammo, you can kill Brutes with three to five headshots, but the DMR helmet strategy is not ideal in low ammo situations. In a mission with a large number of Brutes and no Elites, such as “Exodus” or the holdout section of “The Pillar of Autumn”, swap your plasma pistol for a needle rifle. Three body shots with the needle rifle will cause a supercombine explosion, killing the Brute. You can also use a sniper rifle instead of a needle rifle because a single sniper rifle headshot will kill both Brute minors and majors.
DMRs are also not practical against Hunters because they rarely expose their weak spots and have extremely high health. Because the head of a Hunter is permanently protected by an invincible helmet, you cannot kill Hunters with headshots. Explosives, on the other hand, are much more successful against Hunters because the collateral damage will hit their weak spots even if the explosive is only near the Hunter. For missions with Hunters, save up your grenades beforehand so you will be fully stocked during the fight. Throw frags at the Hunters feet so they roll under them and explode behind them, damaging their rear weak spot. Stick them in their weak spots if possible, but anywhere on their body works too. With fuel rods and rocket launchers, shoot at their feet to avoid missing. If none of these weapons are available, there is almost always a shotgun near a Hunter fight. Move around to the Hunters back, shoot them once in the weak spot, and sprint away before they melee you.
Sprint is the best campaign armor ability because it allows you to quickly travel between areas, escape from areas with too many enemies, outrun melee threats, and run away from explosions. Almost all the other armor abilities are practically pointless in the campaign, although the drop shield is good if you find yourself constantly needing health. However, if you play carefully, you will not need a drop shield and they are relatively rare. Evade is a better version of sprint, but is only available in multiplayer and firefight.