Steam Games Not Loading

[music4mybumhole]

I have a random issue just started this morning, some of my Steam games will not load. I have 7 games installed, but RDR2 and a game called Xmorph: Defense both try to boot but then nothing happens and the play button returns to green from blue.
I have verified the game files for RDR2 and there were no issues. I don't think it's antivirus as I just use Windows and there are no recent events in apps.
It's strange that it's only a couple of games.

Any ideas?
TIA

 

[music4mybumhole]

When I add a desktop shortcut from Steam menu, all I get is a URL shortcut that loads Chrome and displays:
[{000214A0-0000-0000-C000-000000000046}]
Prop3=19,0
[InternetShortcut]
IDList=
IconIndex=0
URL=steam://rungameid/408410
IconFile=C:\Program Files (x86)\Steam\steam\games\7175ed92d8104b40e7888bec36c2e627d3bf9c6e.ico

I have tried uninstalling and reinstalling Xmorph, still no joy.

 

[music4mybumhole]

OK, tried that on RDR2, Rockstar launcher loads and says "You have been logged out because your authentication ticket is no longer valid".
I've reset my password and get the same thing.


Tried Xmorph (run as admin) and nothing happens.
GPU drivers up to date, but also haven't been changed recently.
Also just tried Cyberpunk2077 (first time running) and no issues. I wouldn't mind, but RDR2 and Xmorph are the 2 games I'm playing right now ffs.
This is frustrating as hell.