In Back 4 Blood , each player embodies one of the 8 cleaners and takes advantage of unique advantages. In addition to the cards to unlock, the supply chains make it possible to obtain cosmetics for the heroes. However, the cleaners are not all available from the beginning of the game. Doc, Hoffman, Jim and Karlee appear only after completing the missions of Act 1. But a small surprise awaits solo players at the end of this Journey. Unlock cleaners in Back 4 BLOOD The campaign is cut into 4 acts, separated between 2 and 4 chapters. Evangelo, Walker, Molly and Mom are playable from the start of the game in any mode. However, it is necessary to wait for Act 2 and the introduction of the 4 other characters in order to play them. The latter offer different bonuses and benefits that can come fill the weaknesses of the base team. However, if these characters are unlocked from the launch of the second act, the solo mode does not allow them to unlock them. It must therefore be played in multi...