The latest Call of Duty game heads back to the series’ roots in World War II, roots that haven’t been explored in almost a decade. The last Call of Duty game to be set during that time period was Call of Duty: World at War, and since that the Modern Warfare and Black Ops series have carried the mantle. So naturally, players wondered if the series was stagnating by falling back to safe territory with Call of Duty: World War II.

Thankfully, the game is a lovingly crafted and deep experience, one which mines the horrors and glory of the biggest war ever waged for pathos, thrills, and unrelenting tension. The experience is so intense that there are still likely secrets to be discovered: new characters, new achievements, new playing mechanics, even new multiplayer maps.

A little over a week in, players have already unearthed a treasure trove of hidden features involving the campaign, the massive new social space known as Headquarters, and the star-studded and horror-themed Zombies mode.

Whether you’re a hardcore gamer or just a casual dabbler in Nazi-hunting, there’s plenty to discover in the first Call of Duty title from Sledgehammer Games.

To get you started, here are the 15 Things You Never Knew You Could Do In Call of Duty: World War II.

15. Unlock a secret plot and final boss battle in The Final Reich Zombie mode map

Call of Duty WW2 Zombies Panzermorder Call Of Duty: 15 Things You Never Knew You Could Do In WWII

“The Final Reich” appears several times on this list, because it’s basically a secondary campaign in the game, only one you can share with friends or random strangers you find on the internet. In the Zombie mode map, you spawn in an alley, fighting your way through horrifying half-dead Germans until you reach a bunker containing yet more Nazi horrors.

Like in Zombie modes of previous games, you can restart the power, unblock doorways, and find Mystery Boxes, but in The Final Reich, these things advance the plot and the map rewards you by unveiling a story told through secret cutscenes and audio recordings.

Finally, if you make it through, you face the Panzermorder, the final boss of The Final Reich, annoyingly missing an umlaut from his name, which means Tank Murderer in German.

14. Unlock a secret Mystery Box room in the Groesten Haus survival map

Call of Duty World War II Normandy Landing Boat Soldiers Call Of Duty: 15 Things You Never Knew You Could Do In WWII

The key to surviving the unlockable Groesten Haus is unlocking a Mystery Box to provide the player with more weapons and ammo. Players can earn money through killing zombies and spend it at the Box, which will spit out a random weapon for the player. Unlocking the Mystery Box in the Groesten Haus, though, requires an esoteric solution.

Players will have to find 10 different gas lanterns scattered throughout the Groesten Haus and shoot them all in order to unlock the Mystery Box. Considering that the lanterns don’t really stand out from the rest of the Haus’ décor, it’s a detail casual or first-time player can easily miss amidst the terror of actually trying to survive the waves of fascist undead.

13. Unlock secret player characters in Zombies mode

Call of Duty World War II Zombies Advancing Call Of Duty: 15 Things You Never Knew You Could Do In WWII

In addition to bringing the single-player campaign back to the heady, brutal World War II drama that used to be the series’ bread and butter, the Zombies mode has gone back to its horror roots while keeping the triple-A celebrity guests.

Unlike other COD games, here you can actually choose which celebrity character you play as: David Tennant (Doctor Who, Jessica Jones), Katheryn Winnick (Vikings), Elodie Yung (Netflix’s Daredevil), or Udo Kier (Blade, Iron Sky).

COD: WW2 Zombie mode even lets the players unlock secret characters by completing five hidden objectives. The objectives vary by the character players are trying to unlock.

For example, players wanting to unlock the Survivalist will need to get to Round 30 without purchasing perks, only using the starting weapon, only purchasing two or less Mystery Box weapons, without turning on the power, and without going down once. That’s right, even if another player revives you, you’ve got to start all over again. That’s the level of difficulty inherent in COD: WW2’s secret characters.

12. Use a top-secret version of Modern Warfare 2’s Nuke killstreak bonus: the Tactical V2 Rocket

Call of Duty World War II Combat Soldier Firing Submachine Gun Thompson Call Of Duty: 15 Things You Never Knew You Could Do In WWII

In Call of Duty: Modern Warfare 2 multiplayer introduced a game-changing killstreak bonus known as the Tactical Nuke. If a player managed to get 25 kills without ever dying themselves, they earned the Nuke.

When deployed, it killed all other players on the map and ended the game with a win for whatever side the player who deployed it was on, regardless of which team was actually winning at the time. It was like a more lethal Golden Snitch.

In Call of Duty: WW2, this bonus comes back, though obviously without the nuclear component. Instead, it’s named after the V2 rocket, the German mad science invention that in real life helped lead to space programs worldwide. Only now, the player has to achieve Prestige ranking in all five multiplayer Divisions (COD: WW2’s version of player classes) in addition to getting 25 kills in a single life.

11. Play classic Atari games for Rest and Relaxation in Headquarters

Call of Duty World War II Atari Rest and Relaxation Headquarters Call Of Duty: 15 Things You Never Knew You Could Do In WWII

Activision has been around since the beginning of console gameplay, having designed and programmed games for the Atari 2600. It was responsible for classics like Pitfall (and commercials featuring a young Jack Black) before moving on to other classics like Mechwarrior 2, Spider-Man, and Tony Hawk’s Pro Skater.

They publish the Call of Duty series now, and in the new Headquarters social space in Call of Duty: World War 2, the player can actually play vintage Activision Atari games using armoury credits in place of quarters in the R&R section of Headquarters.

Weirdly, Pitfall isn’t available, but its sequel is, along with classics like Barnstorming, Chopper Command, and River Raid (here inexplicably called River Band). This isn’t the first time Activision has inserted retro games into the Call of Duty series, but definitely the most fun.

10. Play as women in multiplayer

Call of Duty World War II Divisions Multiplayer Call Of Duty: 15 Things You Never Knew You Could Do In WWII

Let’s all be honest: Call of Duty has pretty much always catered to male fantasies. There’s plenty of things to enjoy if you aren’t a male American, but the plots, characters, tone, and design sensibilities have always catered to macho male military jingoism.

However, in COD: WW2, you can now actually play as a woman in multiplayer. Women like shooters and action too, and any gamer knows that one’s avatar online is like a business card, a statement not only of your tactical prowess, but your personality, your style, your skills.

Personalizing the physical form of your avatar and its equipment is almost as much fun as playing it, and if you’re good enough, players around the world will always remember your character as the last thing they saw before they caught a bullet that ended the match.

Sledgehammer deserves credit for opening up the spectrum of what gamers can present themselves as online in one of the most popular gaming franchises ever created.

9. Unlock a secret fireworks achievement in the final boss battle of The Final Reich

Call of Duty World War II Zombies Zombie Headgear Call Of Duty: 15 Things You Never Knew You Could Do In WWII

Assuming you reach the final boss battle of “The Final Reich” in Zombies mode, you’re most likely just trying to survive. You’re probably not paying attention to every detail, and just trying to repel the horrible undead black-magic Nazi monstrosities that the Final Reich is pumping out with astonishing volume.

However, the best way to defeat the Panzermorder is through an incredibly obtuse process of shooting the circling airship in the boss battle, charging up the batteries it drops by killing zombies near them, then shooting the Panzermorder to stun it and placing the batteries on it.

Do this enough times and when the Panzermorder is dead and you’ve beaten Call of Duty: World War 2, fireworks will appear in the sky along with a corresponding achievement as the credits are rolling.

8. Unlock an extra Zombies Survival Map, Groesten Haus

Call of Duty World War II Zombies Officer Fire Call Of Duty: 15 Things You Never Knew You Could Do In WWII

Fun fact: Groesten Haus means Biggest House in German. Groesten Haus is basically the tutorial for the Zombie mode, where players can learn the ropes of what the Zombie mode is all about. However, Groesten Haus can become as much of a survival test as The Final Reich, a feature that casual players might not take the time to find out.

Usually, the tutorial ends when the player dies or quits, but the Groesten Haus allows you to survive. The average player who manages to kill every zombie will find that they will have to locate the Mystery Box hidden on the map.

If they do, they can continue playing the tutorial as a full-featured Zombies map, which helps considering the game only ships with one true Zombies map at launch.

7. Interrupt using a first aid kit by switching weapons

Call of Duty World War II Reloading Machine Gun Gloves Call Of Duty: 15 Things You Never Knew You Could Do In WWII

This seems like a no-brainer, but it can make the difference in Call of Duty: WWII. See, unlike Modern Warfare, COD Blops, Ghosts, or Advance Warfighter, you do not regenerate health. Let’s repeat that, for every reader who was weaned on modern shooters: you do not regenerate health.

This is to the game’s advantage, in that you are forced to do the math before every firefight, deciding tactics and weapons based on how much health you have to spare and how many health packs can patch you up all is said and done.

Thus, a minor saving grace comes in the form of first aid kits taking time to use. If you decide you used one impulsively, accidentally, or unnecessarily, you can cancel it after you press the “use first aid kit” button by switching weapons.

6. Shoot through most wooden cover, but not all

Call of Duty World War II Trenches Clearing Soldiers Call Of Duty: 15 Things You Never Knew You Could Do In WWII

Fun fact: wood is not bulletproof. Older action movies tend to ignore this steadfast fact of physics, allowing heroes to crouch behind overturned tables, drywall, and saloon bars to avoid a hail of dastardly bullets.

In a lot of games, this is true as well, if only because it would be exhausting to develop a game engine to differentiate between the materials cover was made out of, so any walls or furniture that players can hide behind shield them from enemy fire.

Refreshingly, in Call of Duty: WW2, most wooden things that enemies hide behind offer no cover at all, as your weapons can shoot right through them, allowing you to take out enemies dumb or panicky enough to hide behind hay wagons or wooden crates.

Realistically, it depends on the caliber of weapon, the type of wood, and what object it’s making up whether your bullets hit home.

5. Get killed by German suicide bombers

Call of Duty World War II Fire Sherman Tank Village Nazi Flag Call Of Duty: 15 Things You Never Knew You Could Do In WWII

If you’ve played the Call of Duty series, you know that it’s gotten to the point where most of the enemies you shoot are nameless, faceless stereotypes of whatever nation/time period they’re in. Which is why it’s so refreshing to see the game lend a human aspect to some of the grunts you gun down.

One second, you’re clearing out trenches, thinking you’re safe. Then, you turn around to see a German you’ve mortally wounded, but haven’t killed. The next second, that soldier was pulling out a grenade and desperately pulling the pin. Reloading took a millisecond too long, and… you know the rest.

Not only was it organic, visceral, and panic-inducing, but it lent a precious moment of humanity to what in most other games would be just another nameless piece of cannon fodder. It was the definition of an organic video-gaming experience: unable to be replicated, perfectly natural, and unforgettable.

4. Take advantage of squad abilities, spot enemies for you, or call in a mortar strike

call of duty world war 2 squad soldier zussman field rifle tank Call Of Duty: 15 Things You Never Knew You Could Do In WWII

Your squadmates are still useless in Call of Duty: World War II for the purposes of actually killing enemies, like way too many other shooter games. Nazis can be so close you can smell the sauerkraut in their rations and your fellow GI’s won’t so much as pull out their weapons.

However, AI is hard to program, and Call of Duty: World War II does what so many other games don’t– it makes your dumb squadmates useful in ways other than merely being fire support.

Luckily, COD: WWII introduces a fantastic mechanic in Campaign mode whereby you can move close to squadmates and use the D-pad to call on abilities specific to each member.

Zussman will toss you spare health packs, Aiello will throw a smoke marker to call in strikes, and Pierson will use his binoculars to scout the area, showing the player the positions and outlines of enemy soldiers. You have to be near each squadmate to use each individual ability, which makes for fantastic tension in the heat of combat.

3. Perform “heroic actions,” but only if react in time

Call of Duty World War II Machine Gunner Snow Forest Call Of Duty: 15 Things You Never Knew You Could Do In WWII

Call of Duty: World War 2 allows players to perform “Heroic Actions.” The Heroic Action vary by level and situation. A player could go the entire game without performing one, but they would miss out on one of the best and most immersive parts of the game.

Heroic Actions are recorded in the final summation of your performance during the level, and involve dragging an injured soldier to safety, giving groups of enemies the chance to surrender, or helping out embattled groups of allies by turning the tide of battle enough for them to win or escape.

It’s disappointing that the categories for Heroic Actions are so limited, but you have to actually pay attention and look for Heroic Action moments in the midst of the Campaign. Firefights, air support, and point defense are all happening around you in Campaign, so when opportunities for Heroic Actions come, you stand a chance of missing them.

2. Get explosive watermelons as targets in the firing range in the Headquarters area

Call of Duty World War II Commander Josh Duhamel Call Of Duty: 15 Things You Never Knew You Could Do In WWII

Call Gallagher– explosive watermelons can be found in Headquarters by completing the right achievements. Going to the right side of the firing range, players will find circular targets set up, and shooting all the targets that trigger, including the human target boards, will send watermelons plopping onto the ground in the firing range.

These are no ordinary watermelons, however. Players who shoot them will find that they have a little more pep in them than ordinary fruit, and pulpy red chunks will fly in every direction with each bullet hit, as the fruit explode on contact.

The Easter egg has absolutely no importance to any other part of the game (that we know of yet) but it’s a great opportunity for players to let off some steam and watch all the pretty physics of Call of Duty: World War 2’s graphics engine.

1. Find secret soccer balls in the Headquarters

Call of Duty World War II Gridiron Football Soccer Tunnel Headquarters Call Of Duty: 15 Things You Never Knew You Could Do In WWII

Once again, Headquarters gives up some secrets for the most dedicated and soccer-obsessed players. Players in the Headquarters social area can find old timey World War II-era soccer balls that can be passed to other players.

Getting to them, however, requires some old-school platforming skills. Obtaining all three will provide you with an achievement, but it requires some exceptionally creative jumping. By themselves or collected, the soccer balls can be used as a fun diversion by players between multiplayer matches.

The inclusion of soccer balls in a multiplayer space is actually a cheeky reference to Destiny, another game published by Activision. In that game’s between-mission/social hub known as The Tower, players can find a soccer ball in one of several locations. They can actually interact with it just like a real soccer ball, and enterprising players can strike up a soccer match between games.

Can you think of any other Call of Duty: WWII tips and tricks that most players may not know about? Let us know in the comments!

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