Cavalier

Cavalier is an achievement in Halo 3 and Halo: The Master Chief Collection. It is unlocked by beating the par score on the level Tsavo Highway. The achievement is worth 10 Gamerscore. It is represented by a blue circle with a winged sword, also known as the Valkyrie emblem, in the original game and a screenshot of Epitaph in the collection.

The par score for Tsavo Highway is 15,000 points in Halo 3 and 21,000 points in The Master Chief Collection; the difference is due to the fact that the two games feature different campaign scoring formulae. Though the achievement can theoretically be unlocked on any difficulty, more points are awarded in campaign scoring when playing on higher difficulties.

In the original game, players must achieve the par score individually, even when playing cooperatively; in The Master Chief Collection cooperative players share a single score, potentially making the achievement much easier.

Tips
Note: See Guerilla for standard techniques.


 * Turn on the Thunderstorm, Famine and Fog Skull. These are probably the three easiest Skulls. Warning:  whatever you do, do not turn on the Catch Skull because on Tsavo Highway, there are many Grunts along the road and they will be randomly throwing Grenades at your vehicle the tactic basically being: out of all the grenades they spam at the enemy, at least some of them will hit. With Thunderstorm on, the effect will be worse as the newly-promoted Grunt Ultras will pull a lemming and kamikaze run at you. It is important that you have a Brute Chopper with you as well, as it is probably the sturdiest solo vehicle. The other choice would be the Warthog, but after a while the Marines die and you won't have a person to man the Turret. Also, turning on Tough Luck would cause even Grunts to dodge your vehicle when you attempt a splatter. This should most likely be played on Heroic or Normal, depending on your skill.


 * Another way is to get in the Transport Warthog. Arm Marines with heavy weapons, such as the Fuel Rod Gun. Every chance you get a Fuel Rod Gun, give it to a Marine, they'll have unlimited ammo, and it's possible to get all of the Marines armed with Fuel Rods. The rest will run smoothly.


 * In The Master Chief Collection players can earn significant points by destroying unoccupied Covenant vehicles as the game does not differentiate between piloted and empty vehicles; Halo 3 is the only game in the collection with this campaign scoring quirk.

Trivia
Cavaliers were Royalist horse riders during the English Civil War. More recently, the term means a "devil-may-care" attitude. The award is called "Cavalier" because most of it is vehicular combat.