Free McKinsey SFL Island simulator
Play day 1 of the island free with no account, then create a free account (no card) for days 2 and 3 and your full review: 13 submitted stages on a 30-minute clock. US$29 unlocks all 10 Island practices and SFL Classic, or US$79 for all 41 Solve simulations.
Step-by-step PDF guide: free preview with a free account, full guide US$19 or included in the SFL pack.
Start SFL Island free
| Time | 30 minutes on a Simulation clock |
|---|---|
| Format | Onboarding, then three project days with Explore, Assign, Support and Reflect each day; four researchers and four workstations |
| Scored | 13 submitted stages, scored out of 100 |
| Free | Day 1 with no account; a free account (no card) adds days 2 and 3 and a review that explains every decision, with evidence chains, placement maps and team feedback |
| Pack adds | 11 Classic and 10 Island simulations (21 in all, free runs included), the full PDF guides, Learning mode with step-by-step coaching and untimed practice, permanent access, one payment |
Try one Island placement
Your 4 researchers each work 6 hours at one workstation, and a workstation holds at most 2 people. Today's demand is 24 hours, the same as your supply.
| Workstation | Demand | Starts with |
|---|---|---|
| Soil cores | 6 hours | Tomas |
| Tide gauges | 11 hours | Ines |
| Data room | 5 hours | Priya |
| Community desk | 2 hours | Kofi |
Question. Which plan covers the most of today's work?
See the answer
B, Move Kofi to Tide gauges: 22 of 24 hours covered, against 19 for A and 18 for C. It gives up 2 hours at the Community desk to gain 5 at Tide gauges, a net gain of 3 hours.
Questions about free SFL Island practice
Which McKinsey Solve invitations include SFL Island?
Candidates report the newer 30-minute lab, first seen in 2026, in 95-minute invitations. 85-minute invitations report the standard 20-minute lab, which is SFL Classic here.
Do I need an account to play?
Not for day 1: you play it with no account. A free account (no card) unlocks days 2 and 3 and a review that explains every decision.
What does the pack add?
The US$29 SFL pack unlocks all 10 SFL Island practices and all 11 SFL Classic simulations, the full step-by-step PDF guides and Learning mode, with one payment. The US$79 Solve pack covers all 41 simulations across the four formats.
Is this the real McKinsey Sustainable Futures Lab?
No. It is original practice built from candidate and prep-site descriptions, not official McKinsey questions. Solve Game Prep is not affiliated with McKinsey; your invitation and the live tutorial set your real modules and timing.
Independent preparation, not affiliated with McKinsey. Original practice content, not official McKinsey questions; practice runs on our own platform. Facts checked .