Halo Wars

For each mission there is a par time of which you must beat the mission before on Heroic or Legendary for it to count towards the achievement. You can also check which missions you have par time in on either your service record or looking at mission select looking for the timer icon on each picture of the levels.

The par time for each mission is:
Mission 01: 5 - 12
Mission 02: 15 - 30
Mission 03: 8 - 18
Mission 04: 21 - 35
Mission 05: 21 - 35
Mission 06: 15 - 30
Mission 07: 12 - 24
Mission 08: 18 - 30
Mission 09: 18 - 30
Mission 10: 20 - 32
Mission 11: 20 - 30
Mission 12: 8 - 18
Mission 13: 20 - 60
Mission 14: 15 - 30
Mission 15: 20 - 33

(MINUTES.)

Mission 6

In my opinion and it seems in everyone else's as well, this is the hardest mission to complete in par time in 30 mins Heroic or higher. I am a beast at this game and I completed this mission in 17 mins on Legendary on solo by useing a tactic I learned from my friend JOHHNY C4NUCK. Of course turn on the helpfull skulls except for Boomstick so your scorpians don't get killed by other scorpians blowing up.

When you start put 5 supply pads and one reactor, only one because you put your Machine gun spartan in the extra reactor to your right and one of the marine squads in the one on your left. put up all 4 turrets with anti-air for now. put the spartan lazer spartan in the tower that is located up and to the left of your base, then the rocket spartan in the tower next to the first rhino. Forge gets supplies and make distractions seeing as how he is always useless except on mission 1. get your vehicle depo up and make about 6 scorpians as u put the first rhino into position. upgrade canister and clear the next rhino position. make sure you canister the hunters and buildings and get your scorpians point blank so the ones in the back can hit stuff too. once this is clear, be lazy and pelican a rhino to avoid a traffic jam as your scorpians come.
The 3rd rhino spot is easy and just pelican the rhino and 1 scorpian to the location then bring the scorpian back when that spot is clear. as they are being pelicaned bring the rest of you army of tanks which by now should be max population but make more to replace the dead ones as needed. to the 4th rhino spot to spawn kill the locusts and hunters when they come. that spot is easily clearable but dont bring in a rhino yet. put anti-infantry on your base turrets now. bring every tank you got to the last rhino spot and bum rush it like you did the 2nd rhino location to kill it as fast and effectivly as possible bring back your tanks and clear the 4th rhino spot again, your base should be under attack hardcore so protect it with tanks as you make 2 rhinos to pelican out to the last 2 spot before the hunters at you base make quick work of them.

Everything will be in chaos but it dosen't matter because the rhinos are there and you win so MAC away.

This may seem like a lot to do in 17 mins like i did but it goes by fast.

Use your skulls, play solo so you can save when things goes well. Despite that mission 6 was for me the hardest to beat in time, so I like to share how I beated it

Mission 6:

This is not easy to get. Mission 6 is very hard to beat within level time. especially the hunters are a pain in the a**.

You need to use all skulls that increase your abilities at once. note: at the below mentioned save points: if you have needed more time than the suggested time stamps, dont save because you will not finish the fight in time afterwards.

build 2 turrets (front), 1 barracs, 4 supply pads, 1 reactor, 1 vehicle depot. Upgrade supply as fast as you can. Build 2 or 3 marines to use the reactors right and left of your base. Upgrade your base. Build the 2 back turrets. upgrade front turrets with anti-vehicle, back with anti aircraft. After that you can reuse the barrac for armory. You should first reduce time for building your units then add +10 units. upgrade scorpion and wolverine.

Build as much scorpions and some cobra and some wolverine and send them to first rhino target. clear place order rhino and use air transport to deliver rhino to first target. (6-8 minutes) save always before the rhino is in place and fires! to protect your rhino, use one wolverine and 1 scorpion. the rest of your army send to rhino target 2. this should be your main army with many units!!!!

Whenever you lose a scorpion build a new one. at this point of time your staging area should be between the rhino pad and your base (right side). transport scorpions to your main army.

Attack the base, focussing first the buildings then the turrets, then the hunters. deliver rhino (save!!). (15 min) take 1 scorpion and 1 wolverine for protection. heal your main army.

transport your main army (you need only 2- 3 scorpions) to target 3. clear it, order and transport rhino near target. don't place 3rd rhino to target before you have prepared for the last and hard battle!!! meanwhile build 2 scorpions to protect your base. place them in front of the base. (save!!) (18 - 19 min.)

(3rd rhino still not in place for firing!) Transport all scorpion from target 3 near your base. build up to 6 scorpion and order them to target 4. save! Now bring rhino 3 in place. (20 min.) you should 1 -2 scorpions left for base protection.

From now on you need a little bit luck, because the damned hunters will attack your base in masses ;-) Concentrate on the main army and rebuilding units, not the base!

clear target 4. order, transport and position rhino at once on the target. (24. min, you dont need to save but you can) you should have 4th rhino in place. you dont need protection, but you need to look after it for healing. heal main army as often you can. take your main army and head to target 5. there is a covenant building on your way. clear it as fast as possible. when you arrives at target 5: first destroy the turrets, then locusts (locusts and turrents are wide range, hunters not), then base buildings. dont attack the hunters at once, go back a little and heal; you should have 3 scorpions for last attack on hunters). meanwhile order 5th rhino and transport behind your main army, check other rhinos, if needed heal ! while rhino is in transport attack hunters at target 5. as soon as your rhino is back on ground send rhino to 5th target. when the rhino arrives only one hunter pair should be alive, so the rhino cannot be destroyed before he fires. rhino in place. fire (29. min). save!!

finish the building as fast as you can with your MAB.

done! (29.46 sec)

I found Missions 6 and 14 to be the most difficult. Seeing as there are plenty of solutions for Mission 6 and none for 14, I thought I'd tell how I did Mission 14 in under 7 minutes on Heroic:

First, turn on the Catch, Sugar Cookies, Pain Train, Bountiful Harvest, and Emperor skulls.

Then, build the following in this order: Reactor, Supply Pad, Reactor, Reactor, Supply Pad.

While the first Reactor builds, put a spartan in each of the two Wolverines and collect some supplies with Forge.

Once the first Reactor is done, Research 'Twin Engine' for the Elephant. Look for more supplies until the second Reactor is done, but don't send any units up the hill as this will trigger more enemies.

When the second reactor is finished, research 'Defense Turrets' for the Elephant. (You need to research this to get at the next upgrade, which is important)

When the third reactor is done research 'Ceramic Armor' for the Elephant. Then build an Elephant and tell your third Spartan to get in it. Attach the Elephant to the core, select it, and set a move order on the target area. (At this point, if you were already attacked by one Hunter Pair you took too long and will have to start again and make sure you do everything as quickly as possible.)

NOTE: Once you have the Ceramic Armor, sell one of your reactors and replace it with a supply pad. This is to ensure a solid flow of resources so you can use the MAC blast and Repair abilities whenever they are needed.

Now comes the hard part: Select Forge and the two Wolverines and keep them near your Elephant. They are not there to kill, they are there primarily to distract the enemies from the Elephant.

Once you've gone past the first swarm of enemies at the top of the hill, there will be a Wraith a little further up the hill on your right. MAC blast it. There will be a small window to repair your Elephant here so do that too with the Heal & Repair ability.

Once you get to the next enemy group with Flood and Covenant, your Elephant may get stuck as it turns the corner. Simply issue a new move order for it a little bit in front of it and then another one at the target area.

Shortly after this there will be some Jackels in a Sniping Tower on the right, halfway up the next hill. MAC them so that you have an opportunity to heal the Elephant again. Check on your other units to make sure they are not dangerously close to dying. If they are, repair them as much as possible.

At the top of this hill there will be lots of enemies in front of you but the only one you need to kill is the Turret on your right. Use your other units to kill it. Once you start going up the next hill, repair your Elephant as much as possible.

Keep your units close together as you get to the top of the final hill. MAC the Turret on the front left of the Covenant base. You should be in the clear from this point. Once the Elephant gets to the target area, the A.I takes over and you are done.

Once again, just putting this out there as this is a great way to get this mission done without too much trouble. As I said before I finished it in less than 7 minutes so the Par Time will be thrashed. Hope this helps.

Most missions you can play normally and just have fun with it, but for a certain few I found that there is a fairly simple way of doing this. The way my friend helped me get this is to get someone newer to the game (me) to focus on building up the bases, upgrades, and budgets. Put on the skulls that help you out being as you are going for time, not score. While one of you is making uber-bases, the second player will go to the objectives and will do all the dirty work.

Mission 6 the Hardest of the levels to beat in under half an hour.

Here is how i beat it

Skulls: turn on & (those were the only i used because to me it seems as though the AI get these benefits as well even though that's supposedly not the case.

After the cut scene build a supply pad, a reactor, then a supply pad send the marines you start with into the reactor spot to the right of your base then using your warthog drive around to the locations of the resources that are scattered around the level there are 12 spots

while doing this you must multi-task building because time is of the essence so when you get enough money upgrade your base and then build a vehicle depot and then a armory for upgrading your torrents, next fill up the rest of your build spots with supply pads and then upgrade one of those supply pads these should be enough resources to last you for the game, next after saving enough money upgrade to medium torrents, and then large torrents next (this gonna sound like a time waster but trust me on this) wait for 1,200 resources while waiting put Alicia the spartan with the machine gun in the reactor spot in the to the left of your base when you finally obtain 1,200 resources upgrade your reactor then focus on upgrades for the all upgrades for the wolverine but only buy the first upgrade for the tank (Canister shell) next build 3 more torrents the front two torrents should be upgraded with Anti-infantry & the back two get Anti-Air now you just gotta spam a lot of wolverines and place 1 over every spot that the covenant places a building so they wont be able to reinforce the position (note: you may need to play the mission one round through to see exactly where the buildings are)

Now you should have a wolverine over every spot, now all you got to do is order a plasma rhino and then pelican transport each one to its desired zone after that just keep rapidly pressing A when you get to use the MAC blast mainly targeting the base, reactor and air field

(note their can still be covenant infantry at the last drop zone as long as the rhino makes it into the circle)
(note 2: This method works for single player but if done over Co-op you'll get twice the amount of health regenerators, and pelican transports as each you and your partner have your own how ever this still draws from the same resource pool so be careful)
Just be sure that if a unit gets destroyed you replace it, you can also purchase reinforcements to increase your army cap if you have the resources)

Do This:

Mission 6:

This is not easy to get. Mission 6 is very hard to beat within level time. especially the hunters are a pain in the a**.

You need to use all skulls that increase your abilities at once. note: at the below mentioned save points: if you have needed more time than the suggested time stamps, dont save because you will not finish the fight in time afterwards.

build 2 turrets (front), 1 barracs, 4 supply pads, 1 reactor, 1 vehicle depot. Upgrade supply as fast as you can. Build 2 or 3 marines to use the reactors right and left of your base. Upgrade your base. Build the 2 back turrets. upgrade front turrets with anti-vehicle, back with anti aircraft. After that you can reuse the barrac for armory. You should first reduce time for building your units then add +10 units. upgrade scorpion and wolverine.

Build as much scorpions and some cobra and some wolverine and send them to first rhino target. clear place order rhino and use air transport to deliver rhino to first target. (6-8 minutes) save always before the rhino is in place and fires!

After you did this....

just make a shit load of scorpions and rush everything with 1 giant army and get the plasma taks there ASAP i got it in 27 min
(just guard every plasma tank with 1 wolverine prefereble a spartan wolverine)

After looking at the other solutions I can tell you one definate thing to do; use skulls. I always forget to turn them on so I got this without skulls, some with co-op, but they can definately be done solo. Using skulls should help you along pretty well.

The most difficult one for me though was the mission with Rhinos. The goal is to work ahead of the covenent, get units ready to take bases out before they appear, I did this by making a couple cobras to take out the first base, then two each for position 5 and 6 BEFORE moving to position 3. While going through this try to keep the rhinos healed and make flamethrowers or grizzlys depending on what you prefer; take out the reenforcements in the air or on the ground. Good luck!

I used "Tactical Warfare Gaming" videos which made this really easy.

Just watched and follow. Took me 3 days to get this and the "Detour the great journey" achievement.

Same tactics used, except know what you have to do, and after upgrading just complete as fast as you can. Also the par times are quite lenient for most levels.

Also put all skulls on that decrease score, except boomstick.