HUD, drops and hacking

HUD

Start your missions in Mercury and get used to aiming and moving. Kill anything in the way.

The mission map changes every time but there are a fixed amount of tilesets so eventually you will learn the patterns and know where the shortcuts are. As you are low leveled and will not have access to all abilities till you can equip their mods, do make use of cover!

• On the top left is a mini map. The yellow exclamation (!) mark is where the objective is. Once the objective is completed extraction will have a big red mark on the minimap.
• If playing a defense mission or exterminate mission, then just below the minimap you will see how many enemies are left or how much hp the objective you're defending has.
• The top right is your status showing your warframe and it's level. 
• The four boxes show the skills equipped and left to right are assigned 1-4 on the keyboard.
• Blue number is your shield and red is HP.
• The blue bar is the energy you have for using skills and the green bar shows your stamina. Stamina is consumed by running and wallrunning. If it depletes to zero it will take some time to recover and you will fall off if wallrunning.
• The bottom right shows what weapon your using and how much ammo you have left.
• Just above the ammo box at the beginning of the mission you will see a challenge. If you manage to complete it then you get 500 affinity/exp.
• The bottom left is where chat is. Press t to open the chat box. Pressing z will allow you to see your team's hp on the bottom left.
• When you aim at an enemy or object its name will appear on the top middle with level and hp. If the bar is blue then the enemy has shields like your warframe.
• Any drops you pickup will be displayed on the bottom of the screen.

Mini-Map

• The objective of the mission will have a yellow exclamation mark. 
• The arrowhead shape at the centre of the minimap is your position. 
• Green circles are allies.
• That orange mark near the exclamation mark usually appears on extermination missions, showing where the enemies roughly are.
• If someone has an aura mod called enemy radar or if you equip enemy sense the enemy will appear as red circles.
• When someone is downed a red mark will also appear. 
• Once the objective is complete, extraction will be shown with a red mark:

Drops

Containers you can destroy for drops:

Green Lockers you can open by standing in front of them and pressing x.

Only the green ones can be opened unless you find a rare mod that unlocks red lockers. (I haven't found that mod yet...)

If you have the mod “thief's wit” equipped, nearby containers will have a yellow marker on the minimap:

Mods only drop from enemies:
Resources can come from lockers, containers and enemies

The Mod is the one on the left with blue around it. The one on the right with yellow markings are resources. There are also resources which are marked blue and these are generally the rarer resources.

Once you pickup a mod if there is a strange blue spinning thing leftover, it means not everyone in your team has it picked up and you should lay a waypoint by pressing g on it. This way your team can see it on their minimap:

Someone missed their mod :(

Ammo comes in four different colours:

• Blue is for rifles and refills 20 rounds. 
• Orange is for secondary weapons also refilling 20 rounds.
• Green refills shotguns by 10.
• Purple(not shown) refills sniper weapons or bows by 10.

Ammo

Credits are also dropped:

Credits are the small blue rectangular objects.

Energy(blue orb), health (red orb that recovers 25hp) and affinity (white orb that gives exp+100 for the warframe) orbs.

Blue orbs give 25 energy

Blueprints are purple and you can check in your foundry to see what you got. Blueprints used to drop as a purple orb from bosses but that has now been stopped. Instead you will get a blueprint after you finish the mission in your rewards screen. Right now I can only see the stalker dropping blueprints for his unique weapons:

Blueprints

Hacking terminals and other obstacles

Sometimes an enemy will lock you out of rooms and you will have to hack a terminal to open the doors. Once this happens the minimap will show a green marker where a terminal is.

Note how its darker and bigger than your teammates' green

Go to the terminal and press x to start a minigame. In this minigame you have a time limit to click on each piece (they rotate clockwise) until they all join up.

Its not difficult just remember to kill nearby enemies first

If playing as a team most levels will have a door, that needs two people to stand on the orange panels on the side of the door and press x at the same time.

Some missions, corpus levels in particular will have laser doors that you can either slide past or deactivate by shooting a camera. Shooting the camera allows you and your team to pass easily as some doors make it hard to slide past.

Easily slide past

You can spot a camera by seeing the blue rays. They turn red if you trigger them. The lasers are behind the closed door which stops your slide and you could get stuck in the lasers. Cases like this always shoot the camera so your team can follow easily! 

Mission end/rewards screen:

The left side shows your equips and how much exp(affinity) they gained. The more mobs you kill the more exp you gain and as you'd guess the more you use a weapon the more exp it gains. Exp is also determined by how much your team used their primary, secondary and melee weapons.
The right half shows the credits and items you obtained.

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