Braid features a set of achievements that challenge players to go beyond simply completing the main story. Many of these are tied to collecting all puzzle pieces, finding hidden stars, or completing the game under specific conditions. Here's a breakdown of some key achievements and how to unlock them:

- Completionist: Collect all 60 main puzzle pieces. This requires solving every puzzle in Worlds 2-6.
- Star Seeker: Find all 8 hidden stars. This is arguably the most challenging achievement, requiring deep understanding of mechanics and often unconventional solutions. Refer to the 'Hidden Stars' section for guidance.
- Speed Run: Complete the game within a certain time limit (e.g., under 45 minutes). This requires efficient puzzle-solving and minimal rewinding. Practice individual levels to optimize your routes.
- No Rewind Challenge: Complete a specific world or the entire game without using the rewind mechanic. This is extremely difficult and tests your platforming precision.
- The Secret Ending: Unlock the secret ending by collecting all 8 hidden stars. This is a narrative achievement that provides a profound conclusion to the game.
Many achievements in Braid are designed to encourage replayability and a deeper engagement with its mechanics and narrative. Don't be discouraged by the difficulty of some; with practice and a willingness to experiment, all achievements are attainable. The satisfaction of fully mastering Braid's challenges is immense.