> For the complete documentation index, see [llms.txt](https://ctf.0xff.re/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://ctf.0xff.re/2021.md).

# 2021

- [Aero CTF 2021](https://ctf.0xff.re/2021/aero_ctf_2021.md)
- [Not received prize](https://ctf.0xff.re/2021/aero_ctf_2021/not_received_prize.md)
- [FCSC 2021](https://ctf.0xff.re/2021/fcsc_2021.md)
- [Shared Notes (web, 500)](https://ctf.0xff.re/2021/fcsc_2021/shared_notes.md)
- [BattleChip (misc, 495)](https://ctf.0xff.re/2021/fcsc_2021/battlechip.md)
- [UIUCTF 2021](https://ctf.0xff.re/2021/uiuctf_2021.md)
- [phpfuck\_fixed](https://ctf.0xff.re/2021/uiuctf_2021/phpfuck.md)