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InfluxDB
Power Real-Time Data Analytics at Scale. Get real-time insights from all types of time series data with InfluxDB. Ingest, query, and analyze billions of data points in real-time with unbounded cardinality.
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esports-for-engineers
Providing linux scripts, documentation and bug fixes to revitalize classic engineering simulation games. The games are organized into a week-long eSports & mindsports decathlon.
I have a lot of fun playing the FOSS "clone" of Age of Empires: 0 A.D.
https://play0ad.com
I’m a fan of Mindustry (https://mindustrygame.github.io/) which is a mixture of tower defence and rts
Also, if you want to play through the story mode of an rts, I’d recommend Zero-K (https://zero-k.info/)
It goes against OP's stated desire to not do any installation or configuring, but cloning and building Proton-GloriousEggroll [0] can broaden the horizon of what Just Works quite considerably. Once build and copied into place, it's as easy as selecting it in the Proton dropdown.
[0] https://github.com/GloriousEggroll/proton-ge-custom/releases
Classic racing and flight sims such as Grand Prix Legends, Mig Alley/Battle of Britain and Falcon 4 are available for linux here:
https://github.com/sim-museum/esports-for-engineers
(this is free, and does not use steam)