One of my childhood games. One of the best video games series I had ever palyed.

This was one of my favorite games back in the day. Too bad this doesn't work well with the Deck.

game is terrible. no direction where to go.

I've been playing this game since it came out many years ago. I'm 50 yrs old now and still play it. It is fun and easy to get around and doesn't bog your machine down nor too complicated to play. Great FPS.

Yes

one of the greatest FPS of it time i have put hundred of hours into this game long before steam not many players any more but still a lot of fun to play!

Classic fps game. The gunplay is solid (some very cool weapons here that feel great) and I found the story enjoyable. Lots of memorable and well designed levels. The pacing towards the end, more so the last chapter, gets very bad though. Final boss was a bit lame, and the super soldiers aren't particularly engaging, they're just bullet sponges.
You need to patch the game with something to make it crash less and work in widescreen. I played the realrtcw mod for the first time and found it great, fixes the game, adds some qol changes, rebalancing and extra stuff if you want. On vanilla harder difficulties don't do much.
I think it's a must try. Has some unique vibes. Give it a go when you can. I think realrtcw is a good start.