One of my favorite PC games of all time. There's an enduring player base and online community for it, as well as a really solid open source reimplementation: https://openrct2.org/. - Source: Hacker News / 3 months ago

RCT2 is the reason I made a Steam account haha, def check out https://openrct2.org/. Source: 6 months ago

Hey, you might want to take a look at this: https://openrct2.org/. Source: 6 months ago

If you buy the RCT2 pack (https://store.steampowered.com/app/285330/RollerCoaster_Tycoon_2_Triple_Thrill_Pack/) then you can run OpenRCT Project (https://openrct2.org/) on top of it Highly recommend. Source: 11 months ago

Nowadays just buy both on Steam or GOG and use OpenRCT2 to combine both with modern features. Source: about 1 year ago

Clonk Rage, I’m not sure if this counts as it originally wasn’t open source, but it’s not developed further and the creator released the source code for all games of the Clonk franchise. Source: almost 2 years ago

F2P as it will never cost anything. Else anybody could add all freeware, Open Source, abandonware and shareware games. For example go to clonk.de and download all versions for free (except openclonk). Source: almost 3 years ago

I am an OpenStreetMap enthusiast since 2013, before, I was very much involved in a PC game called OpenClonk (and before that Clonk) in my free time. Source: about 3 years ago