A r2con CTF event.
Official URL: https://ctf.radare.org/
This is the CTF within the r2con congress, with plenty of technical talks related to reversing and use of radare2.
Prizes will be given in the r2con congress celebrated in Barcelona from 6th to 8th of September.
To get a prize, a write-up of any solved challenge using radare2 could be requested.