Edits

[2013-05-31]: First posted, with 449 maps in the collection.

[2013-06-04]: osu!tp's beatmap algorithm has been updated, so the current list of hardest beatmaps is different and slightly longer. I may update the list at some point, but it'll take a while.

[2013-06-06]: Updated the collection to match the current list. 11 maps removed and 50 added, for a total of 488.

[2013-06-07]: Added Mediafire download and edited Dropbox one

[2013-06-20]: Updated. Three maps added. One map not removed, as I suspect it'll be back on osu!tp shortly.

[2013-06-25]: Updated. Three more maps added, for a total of 494.

[2013-07-05]: There are now 507 total 50+ maps, but osu!Collections doesn't seem to be working with osu!'s current version, so I can't update here.

[2013-07-06]: osu!Collections fixed. Thirteen maps added for a total of 507.

[2013-07-28]: Updated. Fifteen maps added, for a total of 522.

[2013-08-10]: Updated. Eight maps added, for a total of 530.

[2013-09-10]: The algorithm has been updated again, so it might take a while to update as the list is a few hundred longer now.

[2013-09-29]: Updated. A couple maps removed, a -lot- of maps added, for a total of 810.

[2013-10-18]: Updated. 12 maps added, for a total of 822.

[2013-11-23]: Updated. 30 maps added, 4 unranked/removed maps not added, for a total of 852.

[2014-01-09]: Updated. 31 maps added, 3 unranked/removed maps excluded, for a total of 883.

[2014-01-11]: Updated. 4 maps added, for a total of 887.

[2014-01-27]: Updated. 14 maps added, for a total of 901.

[2014-02-16]: Updated. 20 maps added, for a total of 921.

[2014-03-04]: Put together the list from scratch after a crash. 939 maps now, 3 of which are pending.

[2014-04-20]: Updated. There are now 990 beatmaps, a few of which are pending. With Tom's system integrated into osu!, and with osu!tp only displaying the top 1000, this may be the last update (or I may look into other ways of maintaining the collection).