Strike

A Strike is a cooperative activity available in Destiny. A Strike is a structured, progressive, cooperative adventure "ideal for pick-up groups or friends looking for a quick battle together." Strikes are replayable, designed for three-person Fireteams, and usually take 10-45 minutes to complete, depending on your level.

Strikes always begin in a public area, so the Fireteam can begin participating in public events, encounter other Fireteams, or explore. When the Fireteam enters the "Strike proper," it becomes private, and the Fireteam will no longer encounter other players. At that point, players go through a structured, crafted mission that culminates in one or more boss battles.

After completing 50 strikes, Titan Marks, Warlock Bonds, and Hunter Cloaks will be added to the loot table. Strikes played in the Vanguard Playlist do not count toward this goal.

Earth

 * The Devils' Lair
 * Will of Crota (The Dark Below)

Moon

 * The Summoning Pits

Venus

 * The Nexus
 * Winter's Run

Mars

 * Cerberus Vae III
 * Dust Palace
 * The Undying Mind (The Dark Below)

Vanguard Strikes
Vanguard Strikes, also known as Strike Playlists, allow players to play random Strikes with increased difficulty to earn Vanguard Marks, Vanguard Reputation, and Vanguard gear. They are unlocked at level 16. There are five playlists:

Weekly Strikes
A Weekly Strike is a strike that is played at a high level and with modifiers for rare rewards. Each week, a new strike and set of modifiers are randomly chosen.

Heroic
The Weekly Heroic Strike is a level 24 strike with the Heroic and one other modifier enabled. Weekly Heroic Strikes are unlocked once a Guardian reaches level 20. Matchmaking is used to group up Guardians attempting this strike.

Guardians can select higher difficulties with better rewards. Each of the 3 difficulties can award 3 Strange Coins for a maximum of 9, among other rewards. Completing the Strike once on the highest difficulty will reward the same amount of Strange Coins as when every difficulty is completed in ascending order. To save time, Guardians should simply complete the highest difficulty they can.

Nightfall
The Weekly Nightfall Strike is the same as the Heroic, but played at level 30 and with the Epic and Nightfall modifiers enabled along with 3 others. Matchmaking is not available, so Guardians will have to form their own teams or attempt to complete it alone. Possible rewards for completing this Strike include Legendary or Exotic equipment, Strange Coins, or 6-12 Ascendant Materials. Weekly Nightfall Strikes are unlocked once a Guardian reaches level 27. Completing the Nightfall Strike rewards a Guardian with a buff called "Radiant Light," which increases all experience and reputation gains (except Iron Banner standing) by 25% and is represented by a blue, flaming animation around the head. Radiant Light lasts until the next weekly reset.