For those who are too lazy to compile the game to see what it looks like, here is the official page of Soldat: https://soldat.pl/en/ It has screenshots.
That's a blast from the bast. I played a lot of Soldat in high school in Poland like 15 years ago. We was virtually never doing any actual learning we just played MoH:AA, Unreal Tournament and Soldat for hours.
Soldat and UT for me as well :) And Trackmania. And of course some browser games like MotherLoad.
Good old days, oh we are soo old now :(
The video on this page reminds me so much of Terraria. I think I even saw rocket boots at a few points.