Free USMLE Step 2 CK practice: 299 branching clinical cases.
Play it: https://xairu23.github.io/Critical/
No signup. No paywall. No ads.
Critical is a free, independent case simulator for USMLE Step 2 CK-style practice. Each case starts with a patient presentation. You choose what to do next (order a test, make a diagnosis, start a treatment) and the case branches based on your choice. Every path ends with a debrief that explains why the decision was right or wrong and cites the guideline or trial behind it.
- 299 branching clinical cases
- A sourced debrief for every choice
- Jump to a case by number, or hit Random question
- Recent attempts and progress are saved in your browser
- Light, dark and sepia themes
- Works on phone and desktop, nothing to install
Critical is an educational practice tool, not medical advice, and it does not replace a clinician or your main question bank (UWorld, Amboss and so on). No physician has formally reviewed the full case bank yet. It is not affiliated with, endorsed by, or sponsored by USMLE, NBME, FSMB, ECFMG, or any other organization.
Please open an issue on this repo with the case number and what looks wrong.