Could you try enabling VSync? It disables screen tearing and ignores FPS limiting, though it won't go over your monitor frequency (typically 60Hz).

Yeah I used "Redshift" software on Linux to cope with blue light. I had problem in OpenRA with Snow maps. But it didn't help me so I don't use it. "one thing I have noticed in 0 A.D. is that the lack of contrast makes me strain a bit more to distinguish certain units" This is super annoying thing and reason why I hate all new games. That's how Starcraft 2 looks to me compared to Starcraft 1... terrible thing. I'll check this mod. It'd be really cool if someone would develop some graphics mod to reduce graphical overwhelm so you can really focus on play not at finding and distinguising units during chaos.

Posted 3 hours ago never mind beat the medium bot just now, now aiming for the hard bot.

In my case, I don’t feel like 0 A.D. causes eye strain or headaches directly. I’ve always associated that more with blue light from screens, which is why I’ve been using anti-glare / blue-light blocking glasses for a few years now, and they’ve worked quite well for me. At night, I also enable night mode to reduce blue light intensity. However, one thing I have noticed in 0 A.D. is that the lack of contrast makes me strain a bit more to distinguish certain units—especially when some player colors are too similar to the environment. I think this mod could help reduce that visual strain. I’ve used it for a while and it makes unit differentiation much easier. It might be worth giving it a try.   Regarding FPS, there’s no real benefit in going beyond 60 FPS for this kind of game. Unlocking the frame rate will only make your hardware work harder (especially the GPU) without providing any meaningful gameplay advantage. It just increases power consumption and heat output for no practical gain.

1) I can set to 100, but my PC is weak so it can go up to like 50 or so. And once armies grows, then it drops to 20 regardless of limit in Settings. 2) Also 50-60 limit should be OK - I have that configured in an another RTS and it's fine for my eyes.