How to get Orundum in Arknights: every free source, ranked

Orundum are what you spend on pulls in Arknights: 600 per pull, so 99 pulls to hard pity means 99 × 600. Nobody farms that in a week. What a free player does instead is build a routine that quietly collects 14,390–15,890 Orundum a month and saves it for the banner that matters.

This guide ranks every free source by how much it actually gives, then turns it into a daily, weekly and per-patch checklist. If you only want the monthly number and what it means for your pity, the companion page has it in one table.

Where the Orundum come from, best source first

Ordered by monthly yield. The top two or three lines are what separates an account that pulls every banner from one that does not; everything below is a bonus.

1Annihilation (full weekly cap): about 7,740 Orundum a month, or 12 pulls
2Daily missions: about 3,000 Orundum a month, or 5 pulls
3Events (variable): about 1,500–3,000 Orundum a month, or 2–5 pullsonly in months with an active event, no fixed figure confirmed
4Weekly missions: about 2,150 Orundum a month, or 3 pulls

The routine that collects all of it

Split by how often each source resets. Missing a day is not a disaster; missing a whole endgame reset is, because that Orundum cannot be recovered.

Every day

The steady base of any F2P account in Arknights. Small amounts, but multiplied by thirty days they are usually the largest single line of the month.

Daily missions · 5

Every week

Worth doing on a fixed day so nothing lapses. Weekly caps in Arknights are generous per minute played.

Weekly missions · 3
Annihilation (full weekly cap) · 12

Every patch or event

The line with the widest swing. A good patch can double the monthly Orundum; a quiet one gives almost nothing. Always finish the event shop before it closes.

Events (variable) · 2–5

One-time rewards (new accounts)

Claimable once per account, so they are not in the monthly ranking. On a fresh Arknights account they can outweigh months of routine and are the reason new players pull so much in their first weeks.

Paradox Simulation
Main story & early achievements

What costs F2P players the most

Spending Orundum on the standard banner or on 10-pulls "to see what happens" instead of saving for a limited unit.
Letting an endgame reset in Arknights pass without clearing it: that Orundum is gone for good.
Ignoring the event shop and redeem codes because they are small: together they are often a full multi every month.
Pulling before checking the numbers. Your real chance of the featured unit depends on your pity and your pulls; the calculator shows it before you spend.

If you decide to spend

Only worth mentioning because the value gap is huge: the cheapest recurring pass in Arknights pays several times more Orundum per dollar than any bundle in the shop.

With the Card of Fortitude (~$4.99)+7,100 Orundum / month ≈ +11 pulls

Now do the math

Knowing where the Orundum come from is half of it. The companion page turns the monthly total into pulls, months to hard pity and your real chance of the featured unit, and the calculator takes your exact pity and savings.

Orundum per month as F2P in Arknights Open the Arknights pity calculator

Amounts for Arknights come from fixed rewards plus a conservative range for events. They are rounded and may shift with patches.

Free pulls in other gacha games

Compare monthly free pulls across all games