Challenges

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Last post by sanukayonal@123 « Thu Aug 21, 2025 4:01 pm
Replies: 6
by adum » Mon Jun 02, 2008 6:45 am

6 Replies

40525 Views

Last post by sanukayonal@123
Thu Aug 21, 2025 4:01 pm
Re: hacker.org revival

Last post by Jaymin « Tue Jan 06, 2026 12:28 pm

by Jaymin » Tue Jan 06, 2026 12:28 pm

0 Replies

24 Views

Last post by Jaymin
Tue Jan 06, 2026 12:28 pm
Resources to help with challenges?

Last post by NightFoxy « Mon May 05, 2025 5:50 pm
Replies: 21
by destiny » Sat Mar 14, 2015 1:29 pm
1

2
21 Replies

78223 Views

Last post by NightFoxy
Mon May 05, 2025 5:50 pm
Didactic Scrambled Egg Cipher Pre-Warmup

Last post by Aiyion.Prime « Tue Sep 26, 2023 3:35 pm
Replies: 5
by Meelo » Fri May 01, 2009 12:04 am

5 Replies

23600 Views

Last post by Aiyion.Prime
Tue Sep 26, 2023 3:35 pm
blood sweat tears

Last post by kumaryadav « Thu Mar 16, 2023 10:41 am
Replies: 11
by Caesum » Thu Mar 18, 2010 11:37 pm

11 Replies

30820 Views

Last post by kumaryadav
Thu Mar 16, 2023 10:41 am
Hacker Virtual Machine IDE

Last post by Col. Dump « Sun Aug 21, 2022 6:22 pm
Replies: 17
by Col. Dump » Thu Nov 20, 2008 2:06 am
1

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17 Replies

41110 Views

Last post by Col. Dump
Sun Aug 21, 2022 6:22 pm
Didactic Text 4

Last post by DarthJim « Sat Aug 13, 2022 3:29 pm
Replies: 20
by horst » Mon Mar 09, 2009 11:01 am
1

2
20 Replies

65251 Views

Last post by DarthJim
Sat Aug 13, 2022 3:29 pm
Secure Room

Last post by AMindForeverVoyaging « Tue Jun 21, 2022 2:09 am
Replies: 25
by Allosentient » Sat Nov 22, 2008 6:18 pm
1

2
25 Replies

57883 Views

Last post by AMindForeverVoyaging
Tue Jun 21, 2022 2:09 am
Snake Arithmetic

Last post by tehron « Sat May 21, 2022 5:40 pm
Replies: 40
by Kikifax » Wed Nov 26, 2008 3:24 am
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40 Replies

96958 Views

Last post by tehron
Sat May 21, 2022 5:40 pm
Your Turn, Part Two

Last post by Niker « Sun May 15, 2022 6:18 pm
Replies: 48
by rmplpmpl » Wed Nov 19, 2008 8:22 pm
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48 Replies

92875 Views

Last post by Niker
Sun May 15, 2022 6:18 pm
Make Money Fast

Last post by outsider « Sun Mar 06, 2022 10:42 pm
Replies: 1
by outsider » Wed Feb 23, 2022 8:02 am

1 Replies

9836 Views

Last post by outsider
Sun Mar 06, 2022 10:42 pm
congrat me

Last post by official_musty_jikanjaji « Tue Mar 01, 2022 7:51 am

by official_musty_jikanjaji » Tue Mar 01, 2022 7:51 am

0 Replies

16998 Views

Last post by official_musty_jikanjaji
Tue Mar 01, 2022 7:51 am
Challenge:The Lightest Touch,Help me

Last post by lam « Thu Feb 17, 2022 9:31 am

by lam » Thu Feb 17, 2022 9:31 am

0 Replies

17672 Views

Last post by lam
Thu Feb 17, 2022 9:31 am
Tiny sort

Last post by a.goth « Thu Dec 02, 2021 6:34 pm
Replies: 3
by Hippo » Mon Mar 07, 2016 1:40 pm

3 Replies

15662 Views

Last post by a.goth
Thu Dec 02, 2021 6:34 pm
Lazy Maze

Last post by shantz « Sun Oct 24, 2021 5:05 pm
Replies: 30
by Grammaton » Sat Nov 08, 2008 8:58 pm
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30 Replies

69317 Views

Last post by shantz
Sun Oct 24, 2021 5:05 pm
Not Smaller Yet

Last post by jake1001 « Tue Apr 27, 2021 10:16 am
Replies: 2
by helly0d » Sat Feb 06, 2021 3:44 pm

2 Replies

15130 Views

Last post by jake1001
Tue Apr 27, 2021 10:16 am
Tiny Sentence Reversal

Last post by Hippo « Fri Feb 12, 2021 5:15 pm
Replies: 1
by Hippo » Thu Feb 11, 2021 12:59 am

1 Replies

14827 Views

Last post by Hippo
Fri Feb 12, 2021 5:15 pm
Superhack multithreading stack error?

Last post by Hippo « Tue Feb 09, 2021 5:52 pm
Replies: 2
by W0F » Wed Mar 13, 2013 1:07 am

2 Replies

15996 Views

Last post by Hippo
Tue Feb 09, 2021 5:52 pm
Matrix Recoded

Last post by Hippo « Sun Feb 07, 2021 9:59 pm
Replies: 5
by TheBigBoss » Tue Sep 06, 2016 6:03 pm

5 Replies

25198 Views

Last post by Hippo
Sun Feb 07, 2021 9:59 pm
Portal to the Future

Last post by spaeg « Fri Feb 05, 2021 1:55 pm
Replies: 5
by spaeg » Sun Aug 23, 2015 6:15 am

5 Replies

26130 Views

Last post by spaeg
Fri Feb 05, 2021 1:55 pm
Dungeon Master

Last post by AMindForeverVoyaging « Sun Jan 31, 2021 10:22 am
Replies: 66
by Crunch » Thu Nov 20, 2008 2:28 pm
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66 Replies

158474 Views

Last post by AMindForeverVoyaging
Sun Jan 31, 2021 10:22 am
Cavern Master

Last post by AMindForeverVoyaging « Sun Jan 17, 2021 3:20 pm
Replies: 45
by Kuzmin » Sat Sep 13, 2008 11:29 am
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45 Replies

124568 Views

Last post by AMindForeverVoyaging
Sun Jan 17, 2021 3:20 pm
Didactic Scrambled Egg Cipher Pre-Warmup Challenge

Last post by Niker « Sat Dec 26, 2020 8:59 pm
Replies: 26
by snibril » Wed Nov 05, 2008 2:33 pm
1

2
26 Replies

68454 Views

Last post by Niker
Sat Dec 26, 2020 8:59 pm
Latin Lesson

Last post by Niker « Mon Nov 02, 2020 9:14 pm
Replies: 11
by MyNameIsAlreadyTaken » Fri Oct 22, 2010 3:41 pm

11 Replies

37412 Views

Last post by Niker
Mon Nov 02, 2020 9:14 pm
Did not refresh the next level

Last post by aZ_5 « Sun Oct 25, 2020 4:06 am

by aZ_5 » Sun Oct 25, 2020 4:06 am

0 Replies

20722 Views

Last post by aZ_5
Sun Oct 25, 2020 4:06 am
Challenge 'Didactic Scrambled Egg Cipher' [Crypto] BROKEN!

Last post by outsider « Sat Oct 10, 2020 10:31 am
Replies: 4
by Kami » Thu Nov 06, 2014 8:30 am

4 Replies

21594 Views

Last post by outsider
Sat Oct 10, 2020 10:31 am
Eniac

Last post by Deamhan « Sat May 23, 2020 12:46 pm
Replies: 27
by megabreit » Fri Jan 30, 2009 7:56 pm
1

2
27 Replies

66064 Views

Last post by Deamhan
Sat May 23, 2020 12:46 pm
Sounds Same Warmup

Last post by eulerscheZahl « Wed Apr 29, 2020 6:12 pm
Replies: 8
by MagneticMonopole » Sat Feb 14, 2009 10:08 am

8 Replies

28297 Views

Last post by eulerscheZahl
Wed Apr 29, 2020 6:12 pm
forced entry

Last post by AMindForeverVoyaging « Sat Apr 11, 2020 8:08 am
Replies: 2
by gsjfoe » Sat Jan 15, 2011 3:35 pm

2 Replies

17496 Views

Last post by AMindForeverVoyaging
Sat Apr 11, 2020 8:08 am
Duke Box

Last post by argyblarg « Thu Feb 13, 2020 7:35 pm
Replies: 26
by smutley » Sun Aug 08, 2010 12:08 am
1

2
26 Replies

65428 Views

Last post by argyblarg
Thu Feb 13, 2020 7:35 pm
Test

Last post by lvhao945 « Wed Feb 05, 2020 10:45 am
Replies: 3
by AMindForeverVoyaging » Sat Jan 04, 2020 12:16 pm

3 Replies

16370 Views

Last post by lvhao945
Wed Feb 05, 2020 10:45 am
Deja Vu impossible?

Last post by yes-man « Thu Nov 14, 2019 4:21 pm
Replies: 14
by konsi » Thu Dec 18, 2008 3:13 am

14 Replies

34377 Views

Last post by yes-man
Thu Nov 14, 2019 4:21 pm
Deluge

Last post by Hippo « Fri Jun 21, 2019 4:27 pm
Replies: 7
by tails » Thu Jul 10, 2008 11:27 am

7 Replies

30211 Views

Last post by Hippo
Fri Jun 21, 2019 4:27 pm
Deluge

Last post by Hippo « Mon Jun 17, 2019 10:26 am
Replies: 7
by therethinker » Mon Dec 08, 2008 10:17 pm

7 Replies

26251 Views

Last post by Hippo
Mon Jun 17, 2019 10:26 am
Deluge

Last post by Hippo « Mon Jun 17, 2019 10:15 am
Replies: 17
by laz0r » Sun Aug 21, 2011 3:04 pm
1

2
17 Replies

48694 Views

Last post by Hippo
Mon Jun 17, 2019 10:15 am
Filtration Residue

Last post by Hippo « Tue Apr 09, 2019 7:34 am
Replies: 24
by horst » Thu Oct 01, 2009 10:37 am
1

2
24 Replies

60804 Views

Last post by Hippo
Tue Apr 09, 2019 7:34 am
V.I.L.E.

Last post by Garden_of_Eden « Sat Apr 06, 2019 3:31 pm
Replies: 15
by cutter » Tue Mar 24, 2009 4:15 pm
1

2
15 Replies

54320 Views

Last post by Garden_of_Eden
Sat Apr 06, 2019 3:31 pm
Communicaton of the Past

Last post by g3n35i5 « Mon Mar 04, 2019 4:57 pm
Replies: 4
by g3n35i5 » Fri Mar 01, 2019 4:26 pm

4 Replies

17822 Views

Last post by g3n35i5
Mon Mar 04, 2019 4:57 pm
childish

Last post by g3n35i5 « Mon Mar 04, 2019 7:44 am
Replies: 8
by kaste » Sat Jan 26, 2013 3:46 pm

8 Replies

28196 Views

Last post by g3n35i5
Mon Mar 04, 2019 7:44 am
Find me

Last post by AMindForeverVoyaging « Sun Jan 27, 2019 2:12 pm
Replies: 21
by DanielG » Thu Jan 29, 2009 1:22 pm
1

2
21 Replies

62197 Views

Last post by AMindForeverVoyaging
Sun Jan 27, 2019 2:12 pm
Not Chess

Last post by MindFreakz « Sun Jan 20, 2019 10:16 pm
Replies: 16
by Allosentient » Fri Jun 06, 2008 4:34 am
1

2
16 Replies

56814 Views

Last post by MindFreakz
Sun Jan 20, 2019 10:16 pm
Challenge 'I'm So Special'

Last post by AMindForeverVoyaging « Mon Dec 31, 2018 4:20 pm
Replies: 8
by wicherh » Sun Jan 25, 2009 10:16 pm

8 Replies

32362 Views

Last post by AMindForeverVoyaging
Mon Dec 31, 2018 4:20 pm
One Minute Man with AJAX

Last post by spaeg « Mon Nov 26, 2018 12:26 am
Replies: 1
by spaeg » Fri Nov 23, 2018 1:00 pm

1 Replies

15265 Views

Last post by spaeg
Mon Nov 26, 2018 12:26 am
What in the world

Last post by TheBigBoss « Sat Nov 24, 2018 10:23 am
Replies: 20
by AMindForeverVoyaging » Fri Aug 05, 2011 6:53 pm
1

2
20 Replies

53782 Views

Last post by TheBigBoss
Sat Nov 24, 2018 10:23 am
Didactic Scrambled Egg Cipher Warmup

Last post by AMindForeverVoyaging « Sun Nov 18, 2018 12:16 am
Replies: 8
by Mütze » Sun Jun 07, 2009 12:32 pm

8 Replies

29224 Views

Last post by AMindForeverVoyaging
Sun Nov 18, 2018 12:16 am
Didactic Feedback Cipher

Last post by Hippo « Wed Jul 04, 2018 6:19 am
Replies: 23
by MerickOWA » Wed Oct 15, 2008 1:41 am
1

2
23 Replies

61152 Views

Last post by Hippo
Wed Jul 04, 2018 6:19 am
Acoustic Melodic

Last post by biogood « Mon Jul 02, 2018 2:27 am
Replies: 2
by Tron » Sun Feb 06, 2011 3:30 pm

2 Replies

20641 Views

Last post by biogood
Mon Jul 02, 2018 2:27 am
Spiral Bits

Last post by MrTerry « Sun Jun 17, 2018 12:44 pm
Replies: 38
by m!nus » Mon Dec 15, 2008 7:56 pm
1

2

3
38 Replies

95781 Views

Last post by MrTerry
Sun Jun 17, 2018 12:44 pm
Challenge 'File Mystery

Last post by one.kamila « Wed Jun 13, 2018 3:23 pm
Replies: 20
by hunter » Wed Jun 25, 2008 2:58 pm
1

2
20 Replies

66152 Views

Last post by one.kamila
Wed Jun 13, 2018 3:23 pm
Didactic XOR Cipher 3

Last post by AMindForeverVoyaging « Sat May 26, 2018 1:44 pm
Replies: 35
by MerickOWA » Thu Oct 09, 2008 3:33 pm
1

2

3
35 Replies

91276 Views

Last post by AMindForeverVoyaging
Sat May 26, 2018 1:44 pm

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