For those familiar with the Left 4 Dead franchise, Back 4 Blood should feel like a trip down blood-soaked zombie-ridden lane. Players still group up in teams of four and fight against hordes of zombies to reach a safe room at the end of every level. However, Back 4 Blood builds on Left 4 Dead's mechanics with some brand-new features and tips. 

• For instance some of Back 4 Blood's cards can remove Aim Down Sights (ADS). Some of these cards drastically increase players' reload speed, melee attack speed, weak spot damage, and accuracy. In other words, it's the perfect build for a shotgun paired with a melee weapon.
• When players use their bash attack, they can push enemies back with a quick punch while reloading. It's a useful way to keep the ridden away for a split second and gain some breathing room, but it'd be even better if the attack were lethal. Thankfully, there's a card for that.
• Combat Knife is one of the few cards that belongs in every deck, simply because of its usefulness. With every deck consisting of 15 cards, players can spend just one of those slots on an upgrade to their bash that turns it into a quick knife.
• Co-op is a huge part of Back 4 Blood. Players are naturally directed towards it since the game doesn't dish out any rewards for solo play (at least, at the moment), but that also means they'll likely be thrown into matches with random players. For those who don't feel like talking to the randoms they pair up with, Back 4 Blood's ping system is a lifesaver.
• With the press of a button, players can ping any weapon, ammo pile, or other pieces of equipment they find on the map. For good measure, Back 4 Blood also has a communication wheel that lets players place more contextual pings, including thumbs up or down, pings telling players to group up, and more.e attack. This attack kills all basic ridden in one hit, and paired with another card that heals players for two hit points with every melee kill, it can be an easy way to get free health.
• Throughout Back 4 Blood's levels are copper, weapons, weapon attachments, healing items, and more. Collecting these pickups and making the best use of them are key to winning runs without a hitch, but even more important is finding good pickups. This is partially dependent on luck, but players that want to guarantee that a level gives them good gear need to buy a Tool Kit.
• These kits, which can be purchased at the start of any level or found (albeit not that often), are used to open doors rigged with alarms quietly or specially marked doors that always hold caches of high-tier loot. Regardless of what loot players have, it's always a good idea for at least one person to have a tool kit, just in case.