There are many synonyms for the phrase "got tired" that can be used to add detail and variety to your writing. Some examples include: grew weary, became fatigued, wore out, felt exhausted, ran out of steam, lost energy, flagged, petered out, gave out, and ran low on energy. Each of these phrases conveys a slightly different shade of meaning, which can help you capture the exact feeling you want to express. By using synonyms for "got tired," you can elevate your writing and keep your readers engaged and interested.