As the title says, this thread is about freeware games if you wanna talk about that.
Personally I love freeware games since they're free (duh) and you can sink hundreds of hours into them without having to pay for additional content like you do in free-to-play games.
Since i'm an avid autist and lover of management games I can share some of the more well known freeware games that i've played.
Dwarf Fortress: If you're somehow playing ss13 and you don't know what this game is, then colour me impressed. It's your favourite dwarf strategy management/adventure roguelike whatever you want it to be game. If your brain is big enough to handle the amazing ASCII graphics (use a different tileset you nerd), it's a great game you can sink plenty of hours in. Been in development for years and it still is, buncha games have been inspired by it, most notably Rimworld.
OpenTTD: Wanna be a capitalist? wanna freight goods with trains, ships, planes, trucks or buses? Become the american hero John D. Rockefeller (not sure if that's right I ain't American) and build complex train networks fucking everywhere. Freight all sorts of goods and watch the money flow. Get your friends together and play multiplayer for spicy competition where the goal is to cuck the others as hard as possible. It's all or nothing in this transport tycoon game, overall a pretty fun game.
Cataclysm: Dark Days Ahead: I haven't actually played this game since I didn't want to bother learning it, funny thing about these freeware games is that there is often a steep learning curve. But having watched and heard of others playing it, it does seem fun. It's a roguelike survival game in some post apocalyptic world, it's got ASCII graphics so it's hard to see perhaps. If you learn how to play it i'm sure it hooks you on so you can get a lot of hours in.
Project Reality: If you've heard of the early access game "Squad", this is basically its predecessor. It's free and can be good fun if you enjoy the squad-teamplay military autism. I see it as Arma lite, since you just join a server and jump into a squad instead of having to find a group to play with. A microphone is required to play this, and since microphones are involved, you should maybe expect angry autists. But from my own experiences there haven't been that many, people do expect you to know how to play though and there ain't really a tutorial. So uh, good luck. It can be fun though.
There are plenty of freeware games out there, please do share your own favourite freeware games if you'd like. Remember that browser games and Free-to-play stuff with ingame transactions or paid content do not count as freeware in this case.