Sierra softlock analyzer Static analysis for 30-year-old adventure games. This tool decompiles a Sierra SCI game, abstract-interprets the decompiled scripts into a graph of guarded room transitions, item movements and plot-flag writes, finds the softlocks — states where the game still accepts input but victory has quietly become impossible — and derives, verifies, compiles and installs guards that prevent them. Nothing about any title is declared: the start room, the victory room, the death signal and the debug flags are all discovered from the game's own code. Sierra games, unlike LucasArts ones, let you get stuck. Forget the sunscreen in Los Angeles, board the cruise ship, and you die days later on a raft with no way back. This finds these traps automatically and blocks the crossing that causes them — at the last moment you can still comply.…