Plasma and Bullets
There’s a little touch of genius in the way Halo’s weapons react to different targets. For example, plasma based weapons like the Covenant plasma pistol and rifle wok well against shielding, but not so great against flesh. Conversely, human weapon human weapons that fire bullets work well against flesh but not against shields. To create the ultimate team, work together with some players taking down shields and other players using human weapons to finish enemies off.
Sniper and Patrol
This one’s a bit of a no-brainer, but it always pays to have at least one player in co-op in the role of sniper. Allow them to hang back and find a vantage point while the others attract the attention of troops on the ground. The covenant infantry will almost focus its attention on the nearest targets, allowing the sniper a great deal of freedom to take down some of the more powerful enemies.
Long Range versus Short
Try dividing up your team so that two players are equipped with short-range weapons like the shotgun and needler and send them out first. The other two players should hang back with medium range weapon like the carbine or beetle rifle. Try to hold formation in a triangular shape. It’s the medium range player’s job to make sure that no one flanks the point men and gets behind them.
Take the Flank
Halo 3’s Campaign levels have been cleverly designed to encourage more flanking maneuvers. This means that one team attracts the attention of enemies head-on while the other sneaks around the side to get behind the enemies cover spot. For the flanking team, this will often mean looking for detour routes.
Support Troops
Given that you can only carry one piece of equipment when you are playing alone; your advantage is greatly increased in co-op mode. Now team can bring four pieces instead of just one, and everyone can benefit. Try to drop a bubble shield or regenerator in situations where it cab help the entire group, not just yourself.
On the Road
It’s debatable whether putting all four players in one vehicle is a good idea. It’s certainly a lot of fun, but you are missing out on the potential to use the most powerful mounted weapons. If there are two warthogs available, divide up into terms of two and you will have two mounted turrets to use. Indeed, the same goes for any other vehicle with a mounted weapon.
Grenadiers
It’s all too easy to accidentally blow up your comrades with a grenade or rocket launcher if you don’t announce where you are going to throw them. In tightly packed areas, you are probably best not throwing them at all (you might even blow your self up). On the other hand, in open areas you can all bombard the enemy at once, causing a massive amount of carnage.
