This project is aimed at creating an anti-cheat for the rhythm game osu!. Currently it can detect cheaters who use Replay Stealing software (taking someone else's replay and submitting it as their own).

You will need to install Python 3+ and then install the dependencies for this project:

$ pip install git+git://github.com/osu-anticheat/osu-replay-parser

Currently, this repository can only detect replay stealers.

Run the program from the command line, with the following optional flags.

# compares https://osu.ppy.sh/u/1019489's replay on https://osu.ppy.sh/b/1776628 with the 49 other leaderboard replays
$ python anticheat.py -m 1776628 -u 1019489

# compares the top 57 leaderboard replays against the other top 57 replays (57 choose 2 comparisons)
$ python anticheat.py -m 1618546 -n 57

# compares all replays under user/ with the top 50 scores on https://osu.ppy.sh/b/1611251
$ python anticheat.py -l -m 1611251

# compares all replays under user/ with all replays under compare/
$ python anticheat.py

This means that if you have a replay from a player and want to see if it's stolen, you should place it in the user/ directory and run with the -l and -m flags.

• This program compares the x and y positions of two replays to determine the average distance apart of the cursors.
  • Since the time's rarely match up perfectly, the coordinates from one replay are interpolated from two points in the other replay to estimate its position at the same time

This project is currently maintained by tybug, sam, and trafis. Developemental discussion is currently kept private but that may change with an official, working release of the program.