Login w/ free account. Requires Steam client.

https://store.steampowered.com/app/1662740/RunnerDot/

Return to Mysterious Island added

https://freebies.indiegala.com/return-to-mysterious-island

Login w/ free Steam account. Requires Steam client & ownership of Battlefield 1 base game on Steam. Freebie does not apply to BF 1 on other platforms, only on Steam.

https://store.steampowered.com/app/1314765/Battlefield_1_Shortcut_Kit_Vehicle_Bundle/

Available now

Login w/ free account. Requires Epic Games Launcher client.
https://www.epicgames.com/store/en-US/p/mothergunship

https://www.epicgames.com/store/en-US/p/train-sim-world-2

The Art- Metamorphosis added
https://freebies.indiegala.com/the-art-metamorphosis

Login w/ Prime. Requires free Origin account/gaming client to redeem/play
Scroll down to Games With Prime. Redeem on Origin by 8/20

https://gaming.amazon.com/home?tag=phtwllt-20

Login w/ free account. Scroll down to “Add to library.”

https://freebies.indiegala.com/diabolic

Available now

Login w/ free account. Requires Epic Games Launcher client.

https://www.epicgames.com/store/en-US/p/defense-grid

https://www.epicgames.com/store/en-US/p/verdun