[[quoteright:285:http://static.tvtropes.org/pmwiki/pub/images/HaloWarsWithTeen_6483.jpg]]

->"''[[BadassBoast This is Spartan Group Omega. If they want war, we'll give them war.]]''"

A RealTimeStrategy spin-off of the main ''{{Franchise/Halo}}'' games by [[VideoGame/AgeOfEmpires Ensemble Studios]]. It was toted as an ambitious attempt to bring the RTS genre to consoles[[note]] though it is not the only console RTS, with other examples including ''{{VideoGame/Stormrise}}'', ''VideoGame/UniverseAtWar'', and arguably ''[[VideoGame/SupremeCommander Supreme Commander 2]]''[[/note]] and fulfilled the original concept of ''Halo'' as an RTS series instead of a FirstPersonShooter.

The game takes place towards the beginning of the Human-Covenant War in 2530, roughly twenty years before ''VideoGame/HaloCombatEvolved'' and its sequels. It centers on the crew of the UNSC ''Spirit of Fire'', a former colony ship turned warship that uncovers a plot by the Covenant to accelerate their genocidal campaign on humanity through some newfound Forerunner treasures. The prequel setting draws from corners of the ''Halo'' expanded universe, such as more Spartans, preceding Arbiters, other human colonies, and even a Forerunner shield world. It also introduces numerous new units and vehicles, from enormous Vulture airships, to Cyclops mecha, and mini-walker Locusts, among others. Being an RTS also dramatically increases the scale of ''Halo'' battles. Thought fighting two Hunters as the Master Chief was a challenge? How about twenty of them, supplemented by a fleet of Banshees?

Multiplayer allows one to play as the Covenant as well as the UNSC, and offers different bonus and exclusive units based on the leader of the player's army, whether upgrading units quicker, creating mobile mini-bases, allowing ODST troopers dropped across the field, or even calling a Covenant ship to rain fire from above.
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!!''Halo Wars'' provides examples of:

* AbortedArc: After accessing the relic on Harvest, Anders sees it points to another relic in Arcadia, and three levels are spent smashing through Covenant to find out what's in those ruins. But it's never found out what was in them, as [[spoiler:Anders is kidnapped and the Spirit of Fire chases her to a Forerunner shield world.]]
* ArbitraryHeadcountLimit: ''Halo Wars'' has a quite restrictive limit on the number of units you can have at a time. Not that you can't kill your way through several dozen Covenant with [[TankGoodness Scorpions]], Hornets, [[SuperSoldier Spartans]], [[BoringButPractical Warthogs]], and [[DeathFromAbove MAC Blasts]].
* ArbitraryMinimumRange: Some vehicles such as Scarabs are unable to attack extremely close range opponents.
* AxCrazy: The Arbiter of this game, unlike [[{{VideoGame/Halo 2}} his more calm and rational successor]].
* BadassNormal:
** Sergeant Forge. Not just any marine can face an Arbiter one-on-one and [[CrowningMomentOfAwesome WIN]]. And that's not all. One of the game's unlockables hints he got into fight with a Spartan and ''held his own''.
** Marines you can purchase in-game fit as well, but the ODST's take the cake.
* BittersweetEnding: [[spoiler: The ''Spirit of Fire'' crew manage to destroy the Shield World and prevent the Covenant from acquiring the Forerunner ships on the planet, but they had to sacrifice Sgt. Forge and their slipspace drive to do so, meaning that they have to go into cryostasis without anyway of getting home. At least, not anytime soon.]]
** ''ComicBook/HaloEscalation'' [[spoiler:may have turned this into a downer ending, depending on what happens next. The final panel of issue six shows empty cryotubes on the ''Spirit of Fire'' while Flood infection forms are floating around. Oh, and the ship is flying into a planet...]]
* BondOneLiner: "And for the record, I'd have kicked your ass the first time if the lady hadn't stopped me!"
* BoringButPractical: Warthogs. While they start off like dung, they can be outfitted with Gauss Cannons and troopers on the side with grenade launchers.
** Also the basic Marines, which can be turned into ODST Troopers.
* TheCavalry: 20 minutes into "Arcadia Outskirts", Spartan Omega Team will come to give your army a hand. (Funnily enough, this is ''enforced''; beating all the Covenant before Omega arrives will not end the mission so Omega can "rescue" you.)
* ColdSniper: Jerome-092 is listed as a Sniper in the game. He actually uses a Spartan Laser, but due to its long range and pinpoint accuracy, it acts like a sniper rifle.
* ConstructAdditionalPylons: The only way to get the additional resources needed to build the upgrade buildings and factory buildings needed to get more [[ZergRush military manpower]].
* ClownCarBase: The Elephant. You can train 40 squads - that's 80 flamethrowers or 240 marines out of it. despite the fact it looks like it can hold no more than 20, maybe 30. and even that's pushing it. In fact, if you kill off your guys, you can train even more units out to infinity from this wondrous pachyderm. An achievement requires you to train 100 infantry out of an elephant in a campaign level.
* CripplingOverspecialization: Hellbringers, who wield flamethrowers. They're fantastic against infantry but since VideoGameFlamethrowersSuck and most players prefer to pump out vehicles instead of infantry, Hellbringers tend to be too short range to be of any help. Compare that to the Covenant anti-infantry unit, Jackals, whose beam rifles give them very long range. Hellbringers are best used against ODST and Hunter rushes but against aircraft and tanks they're useless.
* DeadpanSnarker: Serina.
-->"Recalling surface squads so we can all die together, aye sir."
* DeathByIrony: [[spoiler:After the Arbiter almost beats Forge to a pulp, he gets ready to run Forge through with an energy sword, when Forge tells him to look him in the eye. The Arbiter grabs Forge by his head, lifts him up, and says, "My face will be the last thing your pathetic eyes ever see." Forge promptly stabs the Arbiter in the face with a knife, steals the energy sword, and runs the Arbiter through with it, not only killing the Arbiter the same way the Arbiter intended to kill him, but making his face the last thing the Arbiter sees.]]
* DefeatMeansFriendship: [[AllThereInTheManual A collectable Black Box reveals]] that Douglas-042 got into an argument with Forge after [[spoiler:Anders was captured by the Covenant]]. The Spartan recommended that the Covenant ship be destroyed to prevent classified information from getting out, leading Forge to fight him and ''hold his own'' against the SuperSoldier. From then on, Forge and Douglas always ate together in the mess hall.
* DistressedDamsel: [[spoiler:Anders is captured by the Arbiter so the Covenant can use her to activate the Forerunner ships. Though once their back is turned (literally), she escapes on her own.]]
* TheDragon: The previous Arbiter on Harvest seems to have taken up this role for Regret and the other Hierarchs.
** DragonInChief: He's much more threatening than they are as well.
* EarthShatteringKaboom: [[spoiler:The Forerunner Shield World is destroyed by having the ''Spirit of Fire'''s slipspace drive overload in its sun, causing it to go supernova and destroy the planet.]]
* EliteMooks:
** Spartan Group Omega; Spartan II super soldiers. Distinguished by their roughly 7 ft. height, olive-colored PoweredArmor, and ice-cold combat dialogue.
** [=ODSTs=] as well, who are basically space Force Recon Marines.
** The Prophet of Regret's unique units, Honor Guard Elites, which can cloak, have shields, and wield energy swords.
* EnemyChatter: In true Halo fashion, units (infantry in particular) have a staggering array of context-sensitive lines - they complain about the cold on snow-filled maps, they cry out in panic when a friendly leader or powerful unit dies or an enemy leader attacks them, and they cheer when they're winning.
* {{Expy}}: The Grizzly Tank=[[VideoGame/CommandAndConquerTiberianSeries Mammoth Tank]]. They each have 4 sets of tracks, 2 cannons, and crush anything when deployed en masse.
* EmbarrassingFirstName: The Arbiter's given name is jokingly stated to be '[[{{Film/Airplane}} Shirley]]' in the Main Menu tips. His real name is Ripa 'Moramee.
* TheGreatestStoryNeverTold
* HarderThanHard: Legendary difficulty, which features endless respawns of Covenant dropships every minute and dropping a dozen Hunters outside your base.
** Gold medals require you to lose none of your units.
* HeroicSacrifice / UnplannedManualDetonation: [[spoiler:Sergeant Forge stays behind to detonate the Shaw-Fujikawa drive bomb]].
* HotScientist: Anders is a decided example.
* ItHasBeenAnHonor: [[spoiler:Jerome to Sgt. Forge, after the latter takes his place as the guy to activate the slipspace bomb.]]
* KillItWithFire:
** Hellbringers, aka flamethrower marines, which are great against other infantry. Against vehicles and aircraft... [[VideoGameFlamethrowersSuck not so much]].
** Flamethrowers are an excellent way to deal with the Flood's forces, so your base's defense turrets can include them.
* LargeAndInCharge: The Arbiter is noticeably larger and more muscular than even the normal Elites.
* LonelyPianoPiece: "[[http://www.youtube.com/watch?v=Z89adFGjR3g Spirit of Fire]]", the {{leitmotif}} of the eponymous ship.
* MacrossMissileMassacre: The Vultures, especially after the upgrade. Likewise with the Wolverine units.
* MagikarpPower: Marines are a relatively low-power starting unit for the UNSC, and are easily outclassed by higher tier units. However, pour enough investments into them, and they get upgraded to [[EliteMooks ODSTs]] and can be [[ItsRainingMen dropped ten squads in a row anywhere on the map]] via {{Drop Pod}}s.
* TheMedic: Unlike the UNSC, Covenant cannot heal their units whenever they want. Instead they must build Engineers, which serve as passive healers. Combining them with the Scarab makes it nearly unstoppable.
* MiniMecha:
** The UNSC Cyclops, which is based on the Mark III version of MJOLNIR PoweredArmor. It's not as big as the later Mantis from ''VideoGame/{{Halo 4}}'' but still towers over humans and some vehicles.
** The Covenant Locust, best described as a mini-Scarab.
* ObviousRulePatch: Vultures and Scarabs are already so powerful that they can not be driven by Spartans (aside from one campaign mission for the latter.)
* OneManArmy: Covenant leader units like the Arbiter, Brute Chieftain, and Prophet of Regret are powerful enough to engage dozens of enemies on their own. Spartans do well against infantry armies too, though without hijacking they'll need support against vehicles.
* OrphanedSeries: Or game, at least. As soon as Robot Entertainment left, 343 Industries treated it as a distraction at best.
* NoCampaignForTheWicked: Ensemble wasn't even going to consider having a Covenant campaign in ''Halo Wars'' unless they were some kind of rebel heretic faction, and therefore presumably not evil enough to fall under this trope.
* PlanarShockwave: [[spoiler: When the Shield World is destroyed.]]
* PoweredArmor: The Cyclops powered exoskeletons, and the Spartan MJOLNIR suits of course.
* PragmaticAdaptation: The perspective from which the game is played created some necessary exaggerations. For example, Spartans commandeering vehicles do a lot more [[DanceBattler elaborate gymnastics]] in the process of doing so, because more subtle animation would be hard to pick out at that scale. Likewise, the Cyclops's original design called for something similar to the early, pre-Spartan, MJOLNIR PoweredArmor as MightyGlacier infantry. However, this was changed to make it a MiniMecha because the scale made it difficult for players to identify them at a glance on a busy screen.
* PsychoForHire: The Arbiter, who is described ''by his own friends'' as evil and picked up right out of prison, to boot.
* ShoutOut: The ''Pillar of Autumn'' is mentioned when the ''Spirit Of Fire'' arrives at Arcadia. It aids in deploying Rhinos for the third mission there.
** The UNSC Vulture Gunship will sometimes say [[Film/{{Aliens}} "Stay Frosty"]]
** Douglas-042 is a pretty obvious ''Franchise/TheHitchhikersGuideToTheGalaxy'' reference.
* ShootTheMedicFirst: Engineers are priority target when fighting against the Covenant, as enough of them can heal units faster than you can damage them. Since they are air units, Vampires excel against them.
* TheStinger: Beating the game on Legendary will play a voice clip of [[spoiler:Serina waking up Captain Cutter from cryosleep, telling something has happened.]]
* StopPokingMe: Grunts will sometimes say "Yee! Tickles!" when they're selected.
* TacticalRockPaperScissors: Infantry are cheap [[ZergRush Zerg Rushers]] who can fielded by the dozens, but are wiped out by vehicles who are rarer, more powerful, and durable. Said vehicles are then weak to aircraft, who tend to be weaker but faster with a healthy range of firepower, and then those aircraft are trumped by the infantry.
* UnitsNotToScale: Due to gameplay limitations, the Scarab is much smaller here than in ''Halo 2'' and ''Halo 3'', but everything else is the same size the rest of the series depicts it as.
* [[WakeUpCallBoss Wake Up Call Mission]]: The first three missions won't give you too much trouble. Mission 4, Arcadia City, will come as a shock - protecting multiple fragile targets and managing at least 2 bases, all whilst under almost constant enemy attack, serves as a notice to players that things only get harder.
* WarIsHell: [[http://www.youtube.com/watch?v=7O-ebT4MqqM The opening of the game]] really drives this home:
--> "[[CaptainsLog Captain's Report]], Feburary 4th, 2531: Five years. Five, long, years. That's how long it took us to get Harvest back. At first it was going well. Then setback after setback, loss after loss, made what was going to be a quick and decisive win into five years of hell. Of course that's all Harvest is today. It's hell down there. But now it's ours again."
** The Spartans manage to turn this into a BadassBoast: "War Is Hell. And I'm the Devil."
* XMeetsY: ''Franchise/{{Halo}}'' meets ''VideoGame/AgeOfEmpires'' [[RecycledInSpace IN SPACE]].
* YouCantGoHomeAgain: Might be the fate of the crew of ''The Spirit Of Fire'' [[spoiler:due to sacrificing their FTL reactor so that all the Forerunner ships are destroyed.]]