Just wondering if this is a remake or just the first time It's been on steam as AFAIK this was released in 2003 but the steam page says 2022? Just wondering if there was any remastering or such done for the steam release

Nope, they just removed PunkBuster, because licencing stuff
But
https://steamcommunity.com/sharedfiles/filedetails/?id=2800452649

omg its been years since I have heard about PunkBuster. I actually forgot that it existed til this post lol

The original platform where the game was offered was closed, so it was moved here, and the set the release date of 2022, probably nobody gave it a minute's thought..

2.60b can still be downloaded from Splash Damage.

I see this always did grind me gears a bit that steam wont show accurate release dates for existing but older titles migrated to steam