Challenge writeups for Grey Cat The Flag Qualifiers 2022 by NUS Greyhats and the National Cybersecurity R&D Lab (NCL) of Singapore. Also abbreviated as GreyCTF. This ran from 6 June - 10 June.

Challenge writeups for The InfoSecurity Challenge (TISC) 2021 by the Centre for Strategic Infocomm Technologies (CSIT). This challenge ran from 29 October to 14 November.