AlpacaHack
Solve short CTF challenges released every few days, plus solo CTF rounds
AlpacaHack is a Japanese CTF platform. Its main series, Daily AlpacaHack, releases a short challenge at 00:00 JST every few days, each with a set time window, across pwn, rev, crypto, web and misc. Solving it in time puts you on that period's leaderboard, and every past challenge stays open to practise. Players post writeups after each window closes.
Free · Login needed · Browser · Beginner
About AlpacaHack
It trains exploit and puzzle skills in small pieces. Many daily challenges are marked beginner-friendly, while a side series called B-SIDE holds harder and stranger ones. The team also hosts individual CTF events and mirrors past ones.
It appears to be free. You create an account to submit flags and track your solves. Discussing challenges with friends or AI is allowed.
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