Lent

The big whole-game discipline trophy, and the reason to keep a dedicated clean save. From your first minute to the credits you must never eat meat and never kill an animal - the counters in your stats/statistics page must both read zero at the end. The traps: cooked-meat foods and pottages, hunting, and stray kills like trampling a dog or shooting wildlife. Fish is fine (it doesn't count as meat), so live on bread, fruit, cheese and vegetables and cook meat-free. Check the stats page often; if a number ticks up, reload. Runs happily alongside a normal playthrough as long as you're disciplined about your plate and your blade.