Free demo of Styx: Shards of Darkness now available on steam. This is a nice stealth game with pretty graphics and interesting gameplay.
 
Demo includes tutorial missions. If you purchase the base game after, you can continue from where you stopped.
 
http://store.steampowered.com/app/355790/Styx_Shards_of_Darkness/
 

Try Mass Effect Andromeda for free during 10 hours of gameplay. Trial is now available on Origin, Xbox One and PS4.
 
Offer ends November 1, 2017.
 
Play it now: https://www.masseffect.com/trial

http://i.iplsc.com/wolfenstein-ii-the-new-colossus/0006YM1K2RLS5CBL-C122-F4.jpg
 
Wolfenstein II demo is now available on steam. You can play 1st mission for free, and your progress will be saved if you decide to purchase the game after playing the trial.
 
It's currently 50% off
 
http://store.steampowered.com/app/612880/Wolfenstein_II_The_New_Colossus/
 
Demo takes 13 gb, system requirements you can find on the store page

http://www.playulti.com/static/thumb/2017/8/9/attach-1504940015452.jpg
 
The Evil Within 2 demo is now available on steam. If you're not sure of purchase or just want to see how it runs, there is a chance for you to try it out before buying.
 
System requirements (minimum)
 
OS: Windows 7/8.1/10 (64-bit versions)Processor: Intel Core i5-2400 / AMD FX-8320 or betterMemory: 8 GB RAMGraphics: NVIDIA GTX 660 2GB / AMD HD 7970 3GB or betterStorage: 29 GB available space Store page - http://store.steampowered.com/app/601430/The_Evil_Within_2/ Dive into intense and terrifying story with The Evil Within 2 - one of the most expected recent releases.