RPCS3 can run most PS3 games but Steam Deck may fall short in some of them. Recommended specs include 6 core CPU but Deck has 4.

I’m gonna blow your mind by telling you there are already working PS4 and Xbox One emulators, although both only support a small number of games so far

PS3 and Xbox 360 can be emulated very well by a modern PC, the majority of games work without glitches

I’ve had good experiences emulating PS2 on my Steam Deck. PS3 I haven’t gotten anything to run well enough that I’d call it enjoyable. Some don’t run at all

To be fair, PS2 emulation is still not that great, but I guess it’s due to sheer amount of games for that system. Last summer I decided to check the PS2 emulation after 10 year break and 2 out of 3 games I tested didn’t work properly. Granted, those are kinda niche games (Transformers (2004) and Free Running), but compatibility still needs work. Hardware requirements are decently low for the games that do work, though.

To be honest my steam Deck doesn’t go that far beyond 4h either on a single charge when I lower all the settings.

Playing witcher 2 at decent FPS only gives me 2 hours on the original steam deck

That’s the one drag for me about the PS5 contrllers, the battery life before recharging. The PS3 controller did great, but the PS5 ones have so many features built in they die to quick for my liking.