Stalingrad is free on Indiegala (https://freebies.indiegala.com/stalingrad/?dev_id=freebies) until ?? As usual, a free acct is required. Here is a link to it on Steam (https://store.steampowered.com/app/356260/Stalingrad/) so you can check it out.
Pinball FX3 Care Package (https://store.steampowered.com/sub/447069/) Good till 4/8.
The base game for this is always free, and comes with 2 tables. This "Care Package" gives you 9 more. Includes Star Wars bundle 1, Marvel Heavy Hitters, and the Aliens DLC pack.
If you liked Blitzkrieg then you'll enjoy this game. It's a bit older but has some great units and overall, for the price, a cool campaign that covers Stalingrad pretty much beginning to end. Really and under-priced and underrated game.