The honest answer to ps5 has changed at least once, which is why old threads disagree.

Short answer

Support exists where the publisher ships a native build; everything else is streaming or emulation with the trade-offs that implies.

  • Check the store page's supported-platforms box, not the trailer.
  • Confirm whether your friends are on the same build, not just the same game.
  • Stop and reassess after two failed attempts rather than repeating the third.

Siege rewards knowing the building more than knowing the gun, which is why map knowledge outranks aim here. Handheld versions often trail the main build by a full season. Cloud streaming sidesteps the hardware question and introduces a latency one instead.

How to check before you buy

If a step reads as obvious, do it anyway — the obvious ones are the ones people skip and then wonder about. Cross-progression carries your account; crossplay only puts you in the same lobby. Console certification adds weeks to every patch, which is why fixes land unevenly. It helps to understand why a step exists, because then you can adapt it when your situation is slightly different.

Some features are disabled per-platform for reasons that have nothing to do with performance. Store pages list supported platforms accurately; trailers do not. Nothing here assumes a particular playstyle beyond wanting the thing to work.

Which versions exist right now

A cut-down port is still a port, and the difference usually shows up in player counts rather than frame rates. There is no hidden trick here that the game is keeping from you. The community wisdom on this is roughly half right, and the half that is wrong costs the most time.

  • Verify controller support separately from platform support.
  • Assume mobile versions are a different game with the same name.
  • Region and platform change more than people expect, so confirm both.
  • Check whether the version on sale is the current-gen one.

Crossplay versus cross-progression

Screenshots age faster than text, which is why this describes rather than shows. Half the pages on this topic were written for a build that no longer exists, which is why they stop matching what you see. Patch notes move numbers around constantly; the shape of the answer holds even when a specific value shifts. Rainbow Six Siege is not shy about hiding useful information two menus deep, so some of this is simply knowing where to look.

The developers have changed their mind about this at least once, which explains the older advice. Where two approaches both work, the one with fewer moving parts is the one to keep. Where something depends on your platform or region, that is called out rather than glossed over.

Streaming as a fallback

There is usually a fast way and a reliable way, and it is worth knowing which one you are choosing. Do the cheap check before the expensive one — that ordering alone saves most of the frustration. Most of the disagreement you will find online is two people describing different builds.

What follows assumes you are on a current install and have not modified it. The short version is near the top on purpose; the reasoning is there if you want to know why. A single check up front replaces a lot of guessing later.

What you lose on the smaller platforms

Anything that behaves differently on console than on PC is flagged where it matters. If you are coming to this after a long break, the terminology has probably moved on. None of this needs a paid tool, a third-party launcher or an account on a site you have never heard of.

Where people go wrong

  • Assuming a guide from an older season still describes the current version.
  • Grinding a method that was patched months ago because a thread still ranks well.
  • Trusting a video thumbnail that promises a result the video never actually shows.
  • Rushing the last step, which is usually the one with the actual requirement in it.

Siege FAQ

Is the mobile version the same game?

Rarely. It usually shares the name and the art, and almost nothing else.

Why do other guides describe this differently?

Most were written for an earlier version and never revisited. Compare the steps against what your build actually shows.

How long does this take?

Minutes if it goes cleanly, an evening if you hit the edge case in the caveats list. Neither is unusual.

Can I play with friends on a different platform?

Only if crossplay is enabled for that mode. Some modes in Rainbow Six Siege allow it and some deliberately do not.

Bookmark it if you like, but honestly, once you have done it once you will not need to come back.