Hatena Guide: Level 3999 Ticket 931 and Level 0.2 Portal Puzzle

3999: no enemies; read elevator note, take desk ticket, enter code on elevator. 0.2/0.1: cross portals on green lights only; unlock five doors on 0.1 per route memo; align five needle machines on 0.2, then lever—rushing elevator early spawns extra killer. Flashlight deletes random chasers.

Source attribution

• Original: smart_thomas Blog
• Text rewritten for internal deployment.