| Name | Date | Format | Location | Weight | Notes |
|---|
| HSCTF 8 | 14 June, 12:00 UTC — 19 June 2021, 00:00 UTC | Jeopardy |
On-line
| 24.50 | | 89 teams will participate
|
| The Threat Interceptors Challenge | 14 June, 15:00 UTC — 16 June 2021, 15:00 UTC | Jeopardy |
On-line
| 0.00 | | 19 teams will participate
|
| CTF InterIUT 2021 | 18 June, 20:00 UTC — 19 June 2021, 23:59 UTC | Jeopardy |
On-line
| 22.62 | | 16 teams will participate
|
| WeCTF 2021 | 19 June, 17:00 UTC — 20 June 2021, 17:00 UTC | Jeopardy |
On-line
| 25.00 | | 27 teams will participate
|
| CTFZone 2021 | 26 June, 10:00 UTC — 26 June 2021, 20:00 UTC | Attack-Defense |
On-line
| 90.00 | | 12 teams will participate
|
| Hack-A-Sat 2 Qualifiers | 26 June, 14:00 UTC — 27 June 2021, 20:00 UTC | Jeopardy |
On-line
| 25.00 | | 12 teams will participate
|
| Hacky Holidays - Space Race | 02 July, 10:00 UTC — 26 July 2021, 10:00 UTC | Jeopardy |
On-line
| 0 | | 0 teams will participate
|
| CyberThreatForce CTF | 2021 | 02 July, 22:00 UTC — 04 July 2021, 22:00 UTC | Jeopardy |
On-line
| 0.00 | | 10 teams will participate
|
| 0CTF/TCTF 2021 Quals | 03 July, 02:00 UTC — 05 July 2021, 02:00 UTC | Jeopardy |
On-line
| 0.00 | | 4 teams will participate
|
| redpwnCTF 2021 | 09 July, 19:00 UTC — 12 July 2021, 19:00 UTC | Jeopardy |
On-line
| 32.61 | | 28 teams will participate
|
| ENOWARS 5 | 10 July, 12:00 UTC — 10 July 2021, 22:00 UTC | Attack-Defense |
On-line
| 44.33 | | 14 teams will participate
|
| Google Capture The Flag 2021 | 17 July, 00:00 UTC — 18 July 2021, 23:59 UTC | Jeopardy |
On-line
| 99.22 | | 114 teams will participate
|
| RuCTF 2021 | 18 July, 10:00 UTC — 18 July 2021, 19:00 UTC | Attack-Defense |
On-line
| 0.00 | | 19 teams will participate
|
| ImaginaryCTF 2021 | 23 July, 16:00 UTC — 27 July 2021, 16:00 UTC | Jeopardy |
On-line
| 0.00 | | 2 teams will participate
|
| IJCTF 2021 | 24 July, 07:30 UTC — 25 July 2021, 07:30 UTC | Jeopardy |
On-line
| 23.39 | | 0 teams will participate
|
| CyBRICS CTF 2021 | 24 July, 10:00 UTC — 25 July 2021, 10:00 UTC | Jeopardy |
On-line
| 33.32 | | 10 teams will participate
|
| Crypto CTF 2021 | 30 July, 16:00 UTC — 31 July 2021, 16:00 UTC | Jeopardy |
On-line
| 36.00 | | 30 teams will participate
|
| UIUCTF 2021 | 31 July, 00:00 UTC — 02 Aug. 2021, 00:00 UTC | Jeopardy |
On-line
| 23.76 | | 1 teams will participate
|
| RaRCTF 2021 | 06 Aug., 17:00 UTC — 09 Aug. 2021, 17:00 UTC | Jeopardy |
On-line
| 0.00 | | 0 teams will participate
|
| TSG CTF 2021 | 07 Aug., 07:00 UTC — 08 Aug. 2021, 07:00 UTC | Jeopardy |
On-line
| 34.80 | | 1 teams will participate
|
| InCTF 2021 | 13 Aug., 13:30 UTC — 15 Aug. 2021, 13:30 UTC | Jeopardy |
On-line
| 70.41 | | 7 teams will participate
|
| Really Awesome CTF 2021 | 13 Aug., 19:00 UTC — 16 Aug. 2021, 19:00 UTC | Jeopardy |
On-line
| 23.49 | | 7 teams will participate
|
| corCTF 2021 | 21 Aug., 00:00 UTC — 23 Aug. 2021, 00:00 UTC | Jeopardy |
On-line
| 0.00 | | 1 teams will participate
|
| Midnight Sun CTF 2021 Finals | 27 Aug., 10:00 UTC — 28 Aug. 2021, 10:00 UTC | Jeopardy |
Stockholm, Sweden
| 52.92 | | 11 teams will participate
|
| ALLES! CTF 2021 | 03 Sept., 16:00 UTC — 05 Sept. 2021, 16:00 UTC | Jeopardy |
On-line
| 36.35 | | 16 teams will participate
|
| CSAW CTF Qualification Round 2021 | 10 Sept., 20:00 UTC — 12 Sept. 2021, 20:00 UTC | Jeopardy |
On-line
| 0.00 | | 13 teams will participate
|
| COMPFEST CTF 2021 | 12 Sept., 08:00 UTC — 13 Sept. 2021, 08:00 UTC | Jeopardy |
On-line
| 0.00 | | 0 teams will participate
|
| VolgaCTF 2021 Final | 16 Sept., 06:00 UTC — 16 Sept. 2021, 15:00 UTC | Attack-Defense |
Samara, Russian Federation
| 37.50 | | 2 teams will participate
|
| Hack-A-Sat 2 Finals | 17 Sept., 22:00 UTC — 19 Sept. 2021, 22:00 UTC | Attack-Defense |
On-line
| 0.00 | | 3 teams will participate
|
| DownUnderCTF | 24 Sept., 09:00 UTC — 26 Sept. 2021, 09:00 UTC | Jeopardy | | 24.44 | | 18 teams will participate
|
| 0CTF/TCTF 2021 Finals | 25 Sept., 01:00 UTC — 26 Sept. 2021, 09:00 UTC | Jeopardy |
Shanghai, China
| 0.00 | | 3 teams will participate
|
| TastelessCTF 2021 | 01 Oct., 18:00 UTC — 03 Oct. 2021, 18:00 UTC | Jeopardy |
On-line
| 35.64 | | 6 teams will participate
|
| pbctf 2021 | 09 Oct., 00:00 UTC — 11 Oct. 2021, 00:00 UTC | Jeopardy |
On-line
| 24.90 | | 1 teams will participate
|
| SPbCTF's Student CTF 2021 Quals | 10 Oct., 09:00 UTC — 10 Oct. 2021, 18:00 UTC | Jeopardy |
On-line
| 24.33 | | 2 teams will participate
|
| iCTF | 15 Oct., 17:00 UTC — 16 Oct. 2021, 02:00 UTC | Attack-Defense |
On-line
| 0.00 | | 7 teams will participate
|
| N1CTF 2021 | 16 Oct., 00:00 UTC — 18 Oct. 2021, 00:00 UTC | Jeopardy |
On-line
| 53.54 | | 2 teams will participate
|
| CyberSecurityRumble CTF | 05 Nov., 20:00 UTC — 07 Nov. 2021, 20:00 UTC | Jeopardy | | 41.60 | | 3 teams will participate
|
| CSAW CTF Final Round 2021 | 12 Nov., 19:00 UTC — 14 Nov. 2021, 14:00 UTC | Jeopardy |
On-line
| 24.40 | | 2 teams will participate
|
| SPbCTF's Student CTF 2021 Finals | 14 Nov., 09:00 UTC — 14 Nov. 2021, 18:00 UTC | Attack-Defense |
On-line
| 25.00 | Prequalified teams only | |
| Balsn CTF 2021 | 20 Nov., 02:00 UTC — 22 Nov. 2021, 02:00 UTC | Jeopardy |
On-line
| 37.00 | | 1 teams will participate
|
| GrabCON | 24 Dec., 13:09 UTC — 24 Dec. 2021, 13:09 UTC | Jeopardy |
On-line
| 0.00 | | 1 teams will participate
|
