only using 4 squad members, not letting a single solider die, etc) but this would only make it a lot harder and more frustrating so i'd strongly advise against it. This can be done in combination with other achievements (e.g. This can be done on commander or legend difficulty (if you're REALLY looking for a challenge) Avatar meter being full) you will fail the game entirely and will have to totally restart from the beginning potentially losing 20+ hours of gameplay. If you fail the game for whatever reason (e.g. at the start of your turn during battle) and the autosave option makes no difference. The game will save at certain points automatically (e.g. Ironman is a game mode where you can only save once. OK so there's no solution already on here and I suppose there can't really be a 'solution' for this achievement as such, so I thought i'd post some helpful hints and advice.