Free!
Capcom Arcade Stadium:FINAL FIGHT
Add FINAL FIGHT to your Capcom Arcade Stadium game line-up! The criminal Mad Gear Gang dominates the streets of Metro City. At the first sign that Mayor Mike Haggar would oppose the criminals, his family too became a target of their cruelty. For the sake of the city, three brave vigilantes must...
store.steampowered.com
You might need to claim Capcom Arcade Stadium first, if you haven't already, which is also free to claim by clicking on the link for base game.
I still remember all the hours spent playing Final Fight at the arcade. Let's jump on a train to go to an office block to fight the Boss, which was the Boss!
Free!
Capcom Arcade 2nd Stadium: Street Fighter
Add CA2S: Street Fighter to your Capcom Arcade 2nd Stadium game line-up! Skilled fighters and bitter rivals, Ryu and Ken both set out to challenge the world's best warriors in hopes of proving themselves. However, only one can be victorious.
store.steampowered.com
Keep in mind Capcom Arcade 2nd Stadium is a different base game to the above, so you might need to claim it first too. There also seems to be a bug with claiming Street Fighter at this time, so might need to check back later.