Timeline

This is a timeline of the events that transpire within the Batman: Arkham series. Years are labeled according to when they take place relative to when Batman began his career (Year One, Year Two, etc). Citations must be given for any point that is put on the timeline. This timeline (and wiki) considers only the games to be canon, as the tie in comics often contradict the games and each other.

Date Unknown

 * Batman apprehends the serial killer Julian Gregory Day aka Calendar Man. The Gotham City Police take credit for this and try to downplay the existence of Batman.

October 31st

 * Bruce Wayne holds a Halloween party at Wayne Manor. He throws a man named Ian Chase out of the party after he harassed a woman named Clarrisa Rodriguez.

December 24th-25th

 * Batman: Arkham Origins

December 31st

 * Cold, Cold Heart

March 24th

 * Batman: Arkham Origins Blackgate

October 31st

 * The Long Halloween incident begins. Johnny Viti, nephew of Carmine Falcone, is murdered. A .22 pistol is left at the scene of the crime.

November 29th

 * Five Irish gangsters affiliated with the Falcone family are shot to death outside the Gotham Pony Pub. A .22 pistol is left at the scene of the crime.

Unknown Date

 * Jim Gordon, Harvey Dent and Batman strike a deal to work together as allies to take down organized crime. Originally, Harvey suggested to Gordon that they should arrest Batman and not work with a vigilante, but eventually changed his mind. Batman promises that they can "save Gotham" and "crush crime within the year".

April

 * Joker, under the alias "Jack White", begins funding Dr. Young's Titan project.

February 14th

 * Batgirl: A Matter of Family

February 15th- May

 * At some point within this range of dates, Barbara Gordon is crippled in her own home by the Joker, who proceeds to take pictures of her and show them to Jim Gordon.

May 19th

 * Batman: Arkham Asylum

November 19th

 * Arkham City is opened

December 13th

 * Black Mask escapes from Arkham City

January 16th-17th

 * Batman: Arkham City

January 30th

 * Harley Quinn's Revenge

January 31st

 * The Joker is cremated.

October 31st

 * Batman Arkham Knight

January 31st

 * GCPD Lockdown