Explore east to find mission terminals.
Test all ten missions step by step. Jump to any station with supplies and prerequisites ready, or play the entire route from the beginning.
Follow the route east. A mission must be completed and its four-section stone path built before its next checkpoint opens. Fast travel is only available to areas already accessible.
Progress from your revision questions and practical missions. This measures practice, not an official GCSE grade.
Practise calculations, code tracing and extended written answers. Calculations and trace tables are checked automatically. Written responses are self-marked against a practice mark scheme โ not officially graded.
Export a complete game (including its world blocks, items, missions and learning progress) to a JSON file. Import it on this or another computer. Normal and Classroom saves are separate.
No changes have been made.
Safety: importing replaces only the selected slot after confirmation. Your previous slot is backed up locally. Keep a downloaded export of important saves.
Offline lesson assignments and reports. Nothing is sent to a server. Student identifiers should be school-issued codes, not full names.
Choose the assignment supplied by your teacher.
Classroom lessons have their own save slot. Your adventure and Walkthrough Test are not changed.
Import multiple student report JSON files. Each record is stored only in this browser. Export the class summary as CSV; duplicate imports replace the same learner's report for the same assignment.
All J277 questions load automatically. The game includes 131 curated multiple-choice questions plus 180 Exam Lab activities. If served from a local/web server, a valid j277_question_bank.json beside this HTML overrides the built-in multiple-choice bank; otherwise it uses the bundled questions. You can also select a JSON manually.
Loading embedded question bankโฆ
Search all game features, missions, controls and J277 topics โ available offline.
Cost: 4 Wood + 2 Stone + 2 Sticks
Make Sticks from Wood; mine Stone with a Wooden Pickaxe. Then install the base at the cyan foundation just east of spawn.
Not yet built
Cost: 2 Stone โ 4 slabs
First gate: dig the four marked stone foundation blocks between the Logic Vault and the door using a Wooden Pickaxe. Craft four slabs from 2 Stone, then press F by the orange marker to fill each excavated square. Later gates use the usual four-slab marker.
Cost: 2 Wood
Cost: 2 Stick
Cost: 1 Coal, 1 Stick
Cost: 3 Wd, 2 Stk (Dur:10)
Cost: 3 Irn, 2 Stk (Dur:25)
Cost: 3 Gld, 2 Stk (Dur:10, Fast)
Cost: 3 Dia, 2 Stk (Dur:100)
Cost: 2 Wd, 1 Stk (Dmg:2)
Cost: 2 Irn, 1 Stk (Dmg:4)
Cost: 2 Gld, 1 Stk (Dmg:6)
Cost: 2 Dia, 1 Stk (Dmg:10)
Cost: 1 Sil, 1 Gld, 2 Wire
Effect: 2x Time from Questions
Cost: 1 Sil, 2 Wire, 1 Stick
Effect: 30s Instant Mine Buff
Cost: 2 Sil, 2 Iron
Effect: Permanent Respawn Point
Cost: 2 Stn, 1 Coal, 1 Swtch
Effect: Blocks/Damages Viruses
Cost: 2 Irn, 1 Sil
Effect: Shield absorbs 3 Hits
Cost: 2 Wire, 1 Swtch, 1 Irn
Effect: AoE Healing Aura
Cost: 1 Silicon + 1 Iron
Links PCs, switch, router and remote server
Cost: 2 Iron + 1 Silicon + 2 Wire
Connects computers on the LAN
Cost: 3 Iron + 2 Silicon
Remote research station service
Cost: 2 Wire + 1 Switch + 1 Iron
Connects separate networks (also used elsewhere)
Cost: 2 Iron + 2 Silicon + 2 Wire
Builds the Cyber Fortress security terminal
Cost: 1 Silicon
Cost: 1 Stone, 1 Stick
Cost: 2 Silicon, 2 Stone
Cost: 1 Silicon, 1 Stone, 2 Wire
Output 1 if A OR B is 1
Cost: 2 Sil, 1 Stn, 2 Wire
Cost: 1 Sil, 1 Stn, 1 Wire
Cost: 1 AND Gate, 1 NOT Gate
Question goes here
Explanation
You have run out of health.