They could have easily crammed the Steam Deck full of stuff to make it hard to use for piracy - locking down everything, making it usable only to play games you legitimately own, force you to go through who knows what hoops in order to play games on it. That’s what Nintendo or Apple or most other companies do.
But they didn’t, because they realized they didn’t have to. It’s 100% possible to put pirated games on the Steam Deck - in fact, it’s as easy as it could reasonably be. You copy it over, you wire it up to Steam, if it’s a non-Linux game you set it up with Proton or whatever else you want to use to run it, bam. You can now run it in Steam just as easily as a normal Steam game (usually.) If you want something similar to cloud saves you can even set up SyncThing for that.
But all of that is a lot of work, and after all that you still don’t have automatic updates, and some games won’t run this way for one reason or another even though they’ll run if you own them (usually, I assume, because of Steam Deck specific tweaks or install stuff that are only used when you’re running them on the Deck via the normal method.) Some of this you can work around but it’s even more hoops.
Whereas if you own a game it’s just push a button and play. They made legitimately owning a game more convenient than piracy, and they did it without relying on DRM or anything that restricts or annoys legitimate users at all - even if a game has a DRM-free GOG version, owning it on Steam will still make it easier to play on the Steam Deck.
Yeah, so like everyone else has said, generally yes. There are occasionally issues, but the only issues I’ve had so far (that see actually issues with the game running and not anti-cheat that just blocks Linux) have been solved by fixes I found on ProtonDB.
Apparently, on average, games actually run even better on Linux. This is due to the combination of a less bloated OS, but also because proton is translating DirectX into Vulkan, and doing it a smart way such that it’s actually more efficient usually. So far, it’s only GamePass and those few multiplayer games that have fallen short.
Do you happen to know how well this works for old Windows games? We’re talking about random indie things that run in little windows and are native to like Win98. A good lotta old doujin games are like this.
I tried Commandos (released in 1998) the other day. It worked nearly flawlessly. I still needed to set my bottle (application for running wine/proton with presets) to run in an older version of Windows compatibility mode I think, but you need to do that in Windows probably too.
(You do need a fan patch to make it run at modern resolutions, but that’s not required, and it’s needed for windows too.)