Okay well, I have nothing to do this weekend soo...
600p-768p Low settings and Fps is close enough to 30fps to be playable.
Doom 3 BFG "2012" All I have, it's playable but a bit laggy" This is the HD remaster with higher requirements.
Borderlands 1+2
Devil May Cry 1+2+3
Euro Truck Simulator 1+2
Fallout 1+2+3
Fallout New Vegas "Can be laggy in dense areas"
Just Cause 1
Just Cause 2 "With periods of lag"
Farcry 1
Farcry 2 "With lots of tweaking and lag"
Mafia 1
Mafia 2 "Laggy"
Silent Hill 1+2+3+4
Silent Hill Homecoming "random Lag"
The Elder Scrolls 1+2+3+4 "4 with some random lag"
GTA 3
GTA 4 "Can be laggy"
Quake 1-4
Quake Wars "Can be laggy"
Dirt 1+2
Diirt 3 "Laggy and choppy not that enjoyable"
Crysis 1+2 "Both are playable as single player but lag in multiplayer"
LoL
Bioshock 1
Bioshock 2 "With Lag"
Left 4 Dead
Left 4 Dead 2 "600p with okayish random lag"
Tomb raider everything up to Underworld
There is a pattern here, anything from 2009 and below can be made to run but titles that hit 2010 start to become an issue. The main problem you're going to have will be the iGPU sharing your system RAM, by default Windblows is going to take half of it so be wary on everything else running on the PC while you game.
I no longer have any more free game codes thanks to this 🤣