Halo: Campaign Evolved patch will wipe mid-mission saves

Halo Studios' first major patch for Halo: Campaign Evolved arrives next week, and installing it will erase any in-mission saved progress. Unlocked missions and rally points — the game's chapter-selection checkpoints — will remain. The update also fixes a game-breaking Sergeant Johnson progression bug and adds toggles for film grain and chromatic aberration. Full patch notes are promised at release.