Credits
Will mainly allow you to buy your blueprints in the Market and level up your mods. Will also serve later for Primed mods bought from Baro Ki'teer or traded with other players (careful, the recipient still has to spend a 1 million trade tax in credits).
Boosters
All credit boosters stack, do not deprive yourself and use as many as possible!
- you can get a Retriever mod for your animal companions that gives a chance to double credits picked up from enemies
- the first mission of each day has a x2 boost on credits picked up
- the warframe Chroma will allow you to double credits picked up with its 4th ability, very useful in certain missions (Profit-Taker, 1999 caches)
- the Credit Booster, not necessary but appreciated
Sources
Beginner
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selling duplicates
- escape > equipment > inventory. Dropdown menu on the right, select "duplicates". Sell duplicate frame parts you have that are not tradable (ex: "Harrow chassis", you will get plenty continuously)
- /!\ mod sales: NEVER sell your mods for credits, the gain is limited and you should always prioritize Endo when dissolving duplicate mods
- farm Dark Sector: maps with additional boosts, one per planet (ex: Gabii on Ceres)
- farm long missions
- Index on Neptune, go in group / public at the beginning to be accompanied
- Railjack: possibility to be accompanied in Railjack missions as soon as you have an Archwing, good source of credits/resources. Earth and Venus Proxima are quite accessible.
Confirmed
- Credit Drops (use Chroma's ability 4):
- Caches in Capture on 1999
- Profit-Taker
- Railjack in the Veil (high-level)