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simgrammar the grammar of simulation

core loop

accept a generated customer order -> inspect and test the car -> remove parts in order to reach faulty ones -> buy or repair replacements -> reassemble and test drive -> get paid -> upgrade the garage and restore cars for sale

design notes

The car is a tree of modeled parts (over 4000 across 72 cars) with a removal order, so labor is spent reaching a faulty component before replacing it, the series loop carried over from Car Mechanic Simulator 2018. Customer orders are generated without end, while story missions, car and salvage auctions, barn finds, and a project-car restoration supply variety. A skills and garage-upgrade system gates faster or more capable work.

relations

6 stored edges
uses

Contracts and orders

An endless supply of generated customer orders plus story missions with their own requirements provide income.

core
uses

Diagnose and repair

Orders list symptoms; the player examines engine, suspension, and chassis, removes covering parts in a realistic order to reach damaged ones, replaces or repairs them, and verifies the fix, across over 4000 parts on 72 cars.

core
uses

Agent skills

Experience feeds a skills and garage-upgrade system.

supporting
uses

Auctions

Car auctions and salvage auctions supply restoration projects for resale.

supporting
uses
supporting
uses

Vehicle dynamics

Repaired and tuned cars can be driven, including time trials on a race track.

supporting

sources

3
(2026). Car Mechanic Simulator 2021 on Xbox. Microsoft Store
Wikipedia contributors (2026). Car Mechanic Simulator 2018. Wikipedia

provenance

runs in log/runs
2026-10-24
created2026-10-24-catalog-gfcatalog