总共要打四遍才能完整体验冒险。
No matter how well you explore, how many enemies you defeat and how many puzzles you solve, however, the game will still have more surprises up its sleeve by the time you first see the credits roll. Upon starting your game of Resident Evil 2, you'll be asked which character you'd like to play as - rookie cop Leon S. Kennedy or obscenely capable college student Claire Redfield. Seeing the campaign through as either one or the other, you'll be meeting unique characters, fighting different enemies and wielding specialist weapons. Upon completing that campaign, you'll be prompted to begin a New Game '2nd Run,' a follow-up scenario featuring the other character where the ending and certain parts of the game have been changed. It's only after completing this second run that you'll get the 'true ending' of the game, and after this second play through you'll also unlock The Fourth Survivor mode and the 2nd Run scenario for your first character.
So, just like the original Resident Evil 2, you can play up to four full length campaigns with varying enemy placements and puzzle solutions every time. The story beats don't vary wildly between first and second run-throughs with the same characters (and the locations don't really vary at all), but there are subtle differences here and there. Combine this with additional challenges to unlock bonus assets and artwork and a hardcore difficulty featuring stronger enemies and the need to use an ink ribbon consumable item to save, means there's plenty to keep classic Resident Evil fans coming back for third or fourth helpings. For reference, it took me roughly seven hours to complete both my first and second campaign, first as Claire and then as Leon. The divergent story paths will take you through pretty much the exact same areas, particularly in the latter half of the game, but Resident Evil 2 makes sure to switch up the gameplay with different weapons, different key item placements and different puzzle solutions. Most situations, in other words, will not be exactly as you first experienced them (except for, oddly, safe code combinations, which carry over wholesale into 2nd run playthroughs).
——Eurogamer

Both Claire and Leon have two different versions of the campaign, and after finishing the first run for one, you'll be prompted to start a follow-up with the other. Called Second Scenarios, they allow you to see the larger story from a different perspective. Both scenarios are totally isolated from another, and choices therein won't impact the other, but what makes these second runs worthwhile are the different encounters and sub-plots that don't occur in the first. It's a very interesting way to experience the narrative, and with four versions of the campaigns between the two leads--with the first two averaging 12-15 hours--you constantly uncover new details and events that weren't present in the previous playthroughs.
——Gamespot

男女表各通一次才能解锁里关

嗯是的，测评都提到表里关的问题了，只不过不像老生2一样某些A剧本里拿过的东西在B剧本里就拿不到了，很久以前的制作人采访估计当时的意思是取消了这个一次性拿特定道具的设定，不知是制作人没表达清楚还是媒体理解错了导致大家以为没有表里关了…… 另外通关一次AB剧本需要10小时左右，所以全部下来需要20小时。再加上幸存者模式和后续的免费DLC，不得不说这作诚意满满，绝对媲美生4

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