Core problem: you want to play Resonance: A Plague Tale Legacy on Game Pass today, but day-one access is locked to specific tiers, and the PC Game Pass (Xbox app) build is stuttering badly for a lot of people. That is what players are actually talking about right now, not lore or collectibles.

1Confirm You Actually Have Access

Included day-one
Game Pass Ultimate and PC Game Pass
Console plus cloud plus handheld (Ultimate) or PC only (PC Game Pass).
Not included at launch
Essential and console Premium
If the store page asks you to buy the game, you are on the wrong tier.
Decision: on Essential or Premium and you want it now, upgrade to Ultimate for the month, or buy the game. There is no workaround to unlock day-one on the lower tiers. On PC only, PC Game Pass is enough, you do not need console Ultimate.

2Install and Start the Right Way

Console or handheld: install the full game (not just "ready to stream" if you want local play). It supports Xbox Play Anywhere, same save between Series X or S and Windows PC if both are on the same Microsoft account. Pick Performance (60 fps) unless you care more about sharpness than fluidity. Series X is currently the smoothest console version in community and tech chatter.

Cloud if local PC is bad: stream it instead of fighting the Xbox-app PC build.

3The PC Game Pass Stutter Problem

Players and testers report the Xbox app or Game Pass PC version does not pre-compile shaders the way Steam does. Result: hitching, pop-in, and "miserable" first hours even on strong GPUs. Steam is described as much cleaner.

What people are actually doing: play on Series X, S, or cloud if you have Ultimate, this avoids the PC shader issue entirely. If you stay on PC Game Pass, update GPU drivers, set NVIDIA shader cache to 10 GB or Unlimited, give it a long first session so shaders bake in (it does not have a proper "compiling shaders" screen like Steam). If stutter stays unplayable, community consensus is "this is the Game Pass PC build," not your PC. Options are console, cloud, or buying Steam.
No confirmed community fix makes the Xbox-app build match Steam's shader behavior as of Aug 29.

4Key Decisions

SituationChoice
Premium or Essential on consoleUpgrade to Ultimate or buy
PC Game Pass plus stutterConsole or cloud first. Do not assume settings will fix missing precompile.
Want saves on both PC and XboxSame Microsoft account plus Play Anywhere. Do not start a second Steam save if you care about one progress file.
Old GPU (GTX 900 or RX 500)Will not launch on PC. Use cloud or console.
Want Heritage Pack (Minoan Sword, pendant, artbook)That was a pre-order bonus. Game Pass install does not include it.

Common Mistakes

Video That Shows the Game Pass PC Issue

Right now: check tier, install from Xbox app or console, if you are on PC and it is hitching, switch to Series X or cloud rather than chasing settings. That is the practical path players are using two days after launch.