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Challenge Mode is the first PVE (Players vs. Environment) based-mode in CrossFire, requiring players to co-operate to finish the map's preset goal. The most common theme is Zombie, which pits few players against artificial intelligent zombies, monsters, and more within a various themed map.

Availability

  • Zombie Mode (most versions).
  • Zombie Land Mode (Indonesia).
  • Zombie Apocalypse (Philippines).
  • AI Mode (Vietnam).

Maps

Settings

The room can hold up to 4, 5 or 8 players in the match (depending on the map), but a minimum of 1 player are required to start the game. The host can choose the corresponding difficulty level of the game's maps, which consist of Easy, Medium, Hard, Expert or Nightmare. In most maps from Biohazard to Devastated City, Easy difficulty level has a total of 20 rounds (or waves), while Medium has 30 rounds. Hard difficulty adds one Special round after the boss, making it 31 rounds. Players cannot join a game if it has progressed beyond round 17/20 (Easy difficulty) or round 25/30 (Medium difficulty), unless they have Intrusion Coins, or cannot rejoin a game after they have forfeited it in any way (game errors or deliberate quitting). It is not possible to join a Racing challenge midway.

There are three types of Challenge: Survival, Assault and Racing. In Survival missions, players are required to pick up weapons and items from supply boxes and progress through the map from one point to another. In Assault missions, players start with their own equipment and fight off enemy zombies in an enclosed map or areas. Racing challenge is a competitive mode where players race against each other to the end of the track, collecting points by shooting targets and zombies along the way.

Gameplay

Players start the games with 2 or 5 default lives (depending on maps; plus 1 extra life if players equip M4A1-S Jewelry) and begin to shoot down easy zombie opponents such as the Undead and Sprinters, and as it progresses, tougher varieties of enemies begin to appear. In the final round, in most older maps with Easy-Medium difficulties, the zombies will keep spawning until the Boss is defeated, while higher difficulties or newer maps leaves players facing against Boss only.

If the player's health is below 30 HPs, a heartbeat sound will play (which won't stop until the player heals themselves or dies), reminding them to recharge their HP. Players can recharge their HPs with HypoMed. There are two types of HypoMed, the HypoMed-S and HypoMed-L. The small one (recharges 20 HPs) can only be obtained via Reward Crates or in-game supply boxes (Boxes identical to first-aid kits, marked with a red cross "+", cannot be picked up if already maxed out). The large one (recharges 60 HPs) can be bought in Item Shop or found in Silver Crates upwards. The maximum amount of HypoMeds (both S and L) that can be brought into the game are 999, regardless of their number in the storage. Additionally, players can heal themselves by other factors such as critical hits (from applicable VVIP or Anti-Zombie weapons), heal effect (M4A1-S Under Tech's Laser beam), ZM-related effects from Rings (HP Recover and Damage Reflect) and Bless skill (from VVIP characters).

If a player loses all of their default lives, they can continue by reviving themselves or being revived by others, with Revive Token. If players don't use revive tokens, they will have to wait for 40 seconds to be respawned, but if all players die and not revived back soon enough in 8 seconds, they will be forced to leave the room and the game is considered a defeat. If a player leaves the room whilst others are still playing, they can't rejoin that match again until it is completed. Like HypoMeds, the maximum amount of Revive Token that can be brought into the game are 999, regardless of their number in the storage.

Skills

Players can utilize special skills by filling the Adrenaline Bar, which can be achieved when scoring damage against zombies or bosses (except Supporting Items/Skills). When the bar is filled up (indicated by a flashing blue-colored energy bar and a highlighted flashing "F"), they can choose to go "berserk" by pressing the "F" key. The effects differ between various maps:

Available in Biohazard, Unearth, VeniceValkyrie Lab, Crater, Dinner Theater and Crater 2. Once this skill is activated, players will see the screen turn red and hear a roaring sound effect. As long as there is energy left, players will get x2 attack power and x2 movement speed. This Berserk Mode lasts for about 15 seconds, and with the achievement system update, certain achievements pertaining to Zombie Mode allows a longer duration of adrenaline rush.

Available in Thunder Tower. Once activated, players will switch to a FAL Camo with 400 rounds magazine and 40 grenades, enough to use for the entire duration of berserk time.

In Crater (Hard difficulty), random players will be chosen to wield FAL Camo to defeat the Final Boss.

Available in Devastated City and Boss Arena. It can be used as long as the bar is not empty. Players will perform correspondence moves to dodge or send zombies flying away from them to limit damage taken.

Available in Thunder Tower, Devastated City during Round 31 (Hard difficulty) and Boss Arena. In Thunder Tower, once activated, players will switch to a colored TAC-15 Crossbow, which can be used to instantly break Geared Serpent's body which matches that color. In Devastated City and Boss Arena, this crossbow now fires a flaming arrow that carries a mesh net, which covers the boss, slowing his movement whilst dealing with some damage. It has three shots and players can fire them all at once without having to reload.

Available in Crater 2. Pressing F brings up a Shop Menu, where players can purchase various goodies such as Ammunition Refill, Berserk skill, Medic Grenade, Laser Blaster, RPG-7 Freezer or summon the Glacial Beast.

Available in Boss War and Titan Citadel.

Main article: Challenge Mode/Supporting Items

Reward System

Main article: Reward Crates

Players earn points by killing zombies or bosses. The points can be multiplied if there are more players in room (x25 with 5 players, x20 with 4 players, x10 with 3 players, x5 with 2 players and x1 with 1 player). Once they are done with the game and have reached certain numbers of points, they will gain Reward Crates according to the points they have collected (from lowest to highest: Bronze, Silver, Gold, Red and Crystal) that give items ranging from HypoMeds to exclusive, nowhere-else-found and very special weapons (these guns are not permanent, and can only be obtained by this method).

Starting from Medium difficulty, players will earn one (or two) Boss Tokens each time players have defeated a boss, and every 5 tokens of the same Boss will earn players an according Boss Crate Reward, containing special items related to the Boss or permanent weapons.

Trivia

  • All enemies in this mode are immune to Flashbang effect and can see soldiers through smoke by Smoke Grenade, rendering both these grenades useless in this mode. Moreover, since players can't equip Grenade Bag in this mode, it's recommended to equip Type-A Grenade instead.
  • In Challenge Mode, players get higher starting ammo capacity comparing to other modes (x4 in Easy, x3 in Normal and Hard). Ammo mags will also stack up with that starting ammo.
  • It is actually possible to play with 8 players by exploiting a glitch, as seen here. Only the first 4 players will show up on the right-side panel, the other four can be viewed via scoreboard (Tab). While it makes the game easier to play, you won't earn many points for better crates because sharing points with 8 players are way too high if there is no player equipping VVIP weapons which boost point.
    • Although years later, newer maps such as Boss War and Titan Citadel contain a maximum of 8 players.
  • Recent updates on some servers caused the Event Bonus (EXP/GP Plus) feature to affect players' total scores in Challenge Mode. The final scores will be increased based on the EXP plus rate (Example, if a server has 100% EXP plus event, all players will get double points bonus). It's unclear if this was intentional by the publishers or not.
  • The presence of Death Rally features a unique Racing Mode instead of the usual Assault / Survival challenge, which explains why the mode is called Challenge Mode in CF China as the players are required to complete the map's objectives rather than simply fighting zombies.
  • When Challenge Mode was first released, an Assault map should be released together with a Survival map, as can be seen with Unearth & Biohazard, Venice & Valkyrie Lab. However, after Crater was released, there was no Survival map released since.
    • One possible reason is that Survival maps are much harder than Assault maps somehow, since players can't use their own weapons (beside melee weapons) and can only use fixed older ones instead, which made it unpopular to players. Thus, only hardcore players would challenge themselves in these maps.
    • Another reason can be that Survival maps need more time and effort to make, since it needs extra areas, sound effects and voices. Although the concept of extra areas was later applied to newer maps such as Boss War and Titan Citadel onward.
  • The range-attack enemies first appeared in Unearth, Biohazard, Venice and Valkyrie Lab as infected soldiers carrying guns. They will shoot immediately when targets in range, which make it very difficult to avoid attack from them (especially SWAT/Sniper Zombie), thus it can be the reason why they were later been deleted in Crater onwards. Although range-attack enemies came back in Defense Mode and Ranked Zombie Mode as Energy Spitters, they are given a mortar-like attack but still slower than the immediate reaction of infected soldiers, thus it's much more easy to avoid.
  • Most of the maps has a desertion penalty until Metal Rage and below maps when a player leave the game. When the Adventure Mode was introduced to the game, players can freely leave the game without the desertion penalty.

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