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Halo 2

Glitches

Obtain the ''Silent But Deadly'' achievement effortlessly.

Find any level with a grunt or two sleeping, or even an enemy around that can be easily assassinated from behind without alerting anyone around (This enemy should preferably be right after a checkpoint). After you've done this, assassinate them. Be sure to hit the enemy with the reticule not directly on the enemy, as there is no chance for the enemy to fire a few shots off while dying and alerting others nearby. Once you've successfully killed the enemy/enemies, reload to the last checkpoint. From there, just find those enemies again and kill them as before. Keep doing this until you get the achievement, but without getting caught in between loads.

It seems that the game has a glitch, which doesn't reset the "kills without being caught" meter at every reload. May as well exploit it.

Contributed By: halo824.

Unlockables

Acheivements

Complete the following tasks to earn the desired achievement. Note that these only work on the PC version; they will NOT work in the Xbox version.

UnlockableHow to Unlock
Complete each level (seperate achievements) on Normal, Heroic, or Legendary. There are 13 levels (not counting tutorial) for a total of 390 points.(Campaign level goes here) (30 each)
Blow up the Banshee in flight while manned, with grenades or the rocket launcherAir Traffic Control (20)
Melee an opponent from behindAssassin (10)
Hit and kill an opponent from behindBonecracker (10)
Steal an occupied vehicle from an opponent and take it overCarjacking (5)
Kill the sword carrierCounterpoint (5)
Get awarded at least 8 different medals in one non-team gameDecorated Soldier (10)
Complete any level without dying. The tutorial level does not count.Demon (25)
Kill 2 opponents within 4 secondsDouble Kill (20)
Kill an enraged, berserk Brute by meleeGo Ape Shiv (20)
Complete the game on Heroic difficultyHero (50)
If you know someone in the game who has completed the game on Legendary, then kill him.Hired Gun (20)
Kill 5 opponents in a row in the same game, without dyingKilling Spree (20)
4 opponentsKilltacular (20)
Aquire the Scrab gun on the Metropolis levelKing of the Scrab (20)
Complete the game on Legendary difficultyLegend (50)
In a non-team game, kill 5 people by melee, from behindNinja (20)
Play every game variant, with at least 3 other players, until the end of the gameRainman (25)
Run over, hit and kill an opponent with a vehicleRoadkill (10)
10 opponents, same conditionRunning Riot (20)
Kill the sword carrier, after he/she has killed 5 or more opponents in a row with the swordSkewer Stopper (20)
Kill 7 enemies in a row without being spottedSlient but Deadly (20)
Stick an opponent (MP) with a plasma grenade and blow them upStick It (5)
3 opponentsTriple Kill (20)
End someone's killing spree.Vigilante (10)
Play every default map and stay in the game until it's overViolent Cartographer (25)
Complete the game on Normal difficultyWarrior (100)

Contributed By: tjoeb123.