It's time for me to type up a big guide thing about warframe because it has captivated me and it's kind've what I do once that happens.
I saw someone mentioning soloing being hard earlier on in the thread (A few posts ago I think, in fact), and don't get me wrong, it is. Especially early on. As a solo person I figured I'd throw out some info.
First off, solo is an entirely different game from team play. A lot of the advice you hear in regards to pretty much anything can only partially apply or indeed not at all apply! First off, let's go through some mods you're going to NEED for solo play. All of these also apply to team play but given most solo people start off early, since running through missions with three people that can decimate an entire room in a heartbeat doesn't tend to be very fun, it's probably good advice for anyone that's just starting out as well. If you see these mods, grab them and never let them go.
- Redirection. You need a lot of shields. Shields are king in this game, mostly because they regen. Those health pickups you find lying around in early zones will become inadequate fast.
- Vitality. I'll admit this one is perhaps not a huge deal, ESPECIALLY in team play, but if you tend to play recklessly there's nothing wrong with getting a vitality mod and ranking it up a bit. It improves the buffer between shields running out and death, and the health pickups, while woefully inadaqute, do provide some refreshment if you don't get knocked around too bad.
- Fast Deflection. Again, not strictly nessecery, but all the survivability you can get helps in solo play, and your shields regenerating faster reduces the chance of a horde of grineer plowing into your hiding place and generally making a mess of things.
-Armor Piercing damage mods. Sundering Strike, No Return, Piercing Shot, Flechette. In solo play you don't have the benefit of three other people to hose down an enemy if your weapon can't get through the armor. Do your research, IE if your weapon does armor ignore damage then don't bother, but otherwise it's not a bad idea. It won't make all of your damage go through, and it'll still technically add damage to armor ignore weapons (for now), but an elemental mod or base damage mod will generally do you better for damage, a full mechanics chat will have to wait.
Small list huh? There are more mods you want, notably base damage and elemental damage, but this'll get you through earth, where "Uniques", like grineer heavy gunners and such, show up and on to semi advanced content if you've got the fingers for it. If not, don't be afraid to go back and grind up your mods, especially redirection.
Now on to the actual info, more of a list of hints because it's obviously hard to write a full on guide for a randomly generated game.
First off, get.... 15k I think? And buy the Braton. Not the Braton MK-1, the braton. The braton is sooooo much better then the braton MK-1 you start with, it's the difference between night and day. This is your first priority. You may also consider replacing the Lato and Skana but they aren't quite as big a deal. I'd say priority after that would be Skana first (get something that can hit multiple enemies! IE not a single non greatsword), then Lato.
Second, especially if you are in an infested mission, DO NOT GET CORNERED IN ONE OF THOSE LITTLE CLOSETS WITH LOCKERS. I know, they're filled with loot and credits, but make sure you've got the area fairly cleared out. If more then two or three people follow you in there, that closet may just become your tomb.
Third, more of a new guy hint again, bladed weapons do 3x damage to small infested units and MOA when the shields go down. That is... quite a lot, and a pretty big reason why Orthos is probably one of the best melee weapons. Don't be afraid to switch your Bo or whathaveyou out for a bladed weapon if you're going into a nasty infested mission or if MOA are giving you grief.
Fourth, MOA's often will run straight into your cover and shoot you to death with no care for their personal safety. Don't just run away from them, kill them if you've got the shields. They will run out of MOAs, then you can pick them off or just go ape on them, if most of their force was MOAs, which can be the case surprisingly often.
Fifth and final. USE COVER. This is something that takes some people some time to get used to (understandably, you see the term space ninja and think you're supposed to blitz around and shoot everything to death), and it's very important for solo play. Almost nonexistant in team play. Use the left side of doors (the game only let's you target the right side of the screen with aiming, so it' sgotta be the left) You can actually hide behind either side of doors, use the H key to switch which side you can see! (Thanks to Biowrath, and a runner up thank you to Naxza.), to poke around and shoot things to death. If the AI derps out, this can be an easy death to a grineer heavy gunner or other unique.
And I'll leave the new folk with more info, if you intend to solo for a while, get ash or loki or rhino as a frame first. If you started with loki you're in a good place, if not, well all the starting frames are fantastic, some are just better for solo play. The cloak on both of them makes soloing much easier, and gives you an easy out if you need to get out of situation that's bad and getting worse. Ash tends to do more damage then loki, but loki's got the best sprint speed in the game and generally good ways to run through levels without needing to kill much of anything. I personally grabbed Ash, although he's apparently hell to farm for. Rhino has huge armor and uses iron skin and becomes immortal and then kills everything with stomp. Rhino in my opinion is a little rediculous at this point but he's still an excellent solo option. Rhino in general is better for reckless play, Ash and Loki reward caution.
So yeah, just figured I'd throw out some info in case people were looking into this with update 10 just out. The early game can be very frustrating, doubly so if you decide to solo. Might make some more later. IGN is Seriyu, if anybody needs anything, although I may not always be able to run with you, I should be good to go most of the time. I am not in the B12 guild, just as a heads up. For any veterans of the game, please feel free to shout at me if I got anything wrong in the thread.