r2con is a congress around radare2, a multiplatform, opensource reverse engineering framework and tooling. The meeting aims to let all r2 developers and users around the world stay 4 days hacking, teaching, discussing and coding stuff while having fun and taking beers. This writeup aims to make a call for everyone who wants to speak at r2con by sending its proposals to: firstname.lastname@example.org. To make that clear: All talks must be around radare2, topics can cover from malware analysis, reversing, exploiting, forensics, data analysis, development, etc. Submissions will be accepted until end of June.