Past tense of 'game': played games, or manipulated a system to achieve a desired outcome.
From Old English 'gamen' (amusement, fun), Germanic root. 'Gamed' as past tense adds the -ed suffix standard in English.
In modern usage, 'gamed the system' means someone cleverly exploited rules in unintended ways—like Amazon discovering that negative reviews still boosted algorithm visibility, so they 'gamed' the system by encouraging customers to complain.
Complete word intelligence in one call. Free tier — 50 lookups/day.