Going to play in retro shooters like doom, wolf3d, duke, blood, etc at least natively or with source port asking because I am tomorrow go to work to buy steam deck 512 GB for 85000₽
May as well add this to your play list. And for those not familiar with it: https://en.wikipedia.org/wiki/Chex_Quest
Didnt notice the title at first, though it was Heavy and Soilder from TF2
So what exactly is the question? They work. I player Spear, Doom 2 and Doom 64 on Deck. Recommend Zero Tolerance on Genesis emulator.
I personally use ECWolf for Wolfenstein 3D, Crispy Doom for Doom, Ironwail for Quake, the native Steam remaster for Quake 2, Xash3D for Half-Life, NBlood for Blood, EDuke for Duke Nukem 3D, VoidSW for Shadow Warrior - there’s probably one or two that I’ve forgotten.