May 21st free games roundup

I love Thursdays because they bring a fresh wave of free games to claim and keep forever. Today's lineup is here, featuring tactical operations and sci-fi adventures.

Amazon Prime Gaming

Hot Brass

If you enjoy tense, top-down tactical shooters, this co-op SWAT game is right up your alley. You and your friends must breach rooms, defuse hostage situations, and neutralize threats where every single shot is fatal. It is available to claim until June 24.

Space Grunts

This fast-paced sci-fi roguelike takes turn-based mechanics and speeds them up so much it feels like an arcade shooter. You will navigate a procedurally generated moon base. You must fight aliens and manage your resources to survive. You can grab this one until August 19.

Palindrome Syndrome: Escape Room

Waking up on a spaceship with no memory is a classic sci-fi trope, and this game turns it into a massive puzzle box. You will investigate your past and solve environmental puzzles to figure out exactly what went wrong. Prime members can claim it, but like all Prime Gaming offers, it's time-limited and typically expires later this month or next.

GOG

Warhammer Skulls 2026 Digital Goodie Bag

The annual Warhammer Skulls festival is back, and GOG is handing out a free promotional pack to celebrate. It is mostly digital wallpapers and art rather than a full game, but it is a nice bonus for fans of the grimdark universe. The goodie bag is available until May 28th, 4 PM UTC.

Make sure to claim these games quickly. All of these offers are time-limited, so grab them before they expire.