A brand new month means a fresh batch of games for Prime Gaming members. That’s right, with an active Amazon Prime subscription, you can access a library of free games every month without paying a single dime. For September 2025, the lineup includes the likes of Necroking, Marvel’s Midnight Suns, and many others. So, here’s the complete list of 10 games available on Prime Gaming this month.

1. Sid Meier’s Civilization III: Complete

If modern strategy games aren’t doing it for you, then Prime Gaming is offering you a classic: Sid Meier’s Civilization III: Complete. This is a complete bundle that includes the base game alongside the Conquests and Play the World expansions. Even though the game is more than 20 years old, its gameplay and charm are still there. If that’s not enough, the community has crafted tons of mods that overhaul the experience and improve the game in many different ways. Don’t miss out on claiming this one.

Game NameSid Meier’s Civilization III: CompleteRelease Year2001DeveloperFiraxis Games

Claim Sid Meier’s Civilization III: Complete on Prime Gaming.

2. Thief Definitive Edition

Thief Definitive Edition. (Image via Edios Interactive Corp)

Prime Gaming has got you covered this month as well if you’re a stealth fan with Thief: Definitive Edition. You will step into the shoes of Garrett, who is a master thief in the shadows, sneaking past guards and stealing everything within his sight. Its core gameplay is basically stealth, and it’s fun to play if you don’t want a game that drains you mentally. While the enemy AI isn’t the best thing we’ve seen, getting spotted by those guards can still be troublesome. With its strong visuals and sound design, it’s a great game, especially when it doesn’t cost a thing.

Claim Thief Definitive Edition on Prime Gaming.

Game NameThiefRelease Year2014DeveloperEidos-Montreal

3. Necroking

Necroking. (Image via KORO.GAMES)

Roguelikes are still the talk of the town, and Necroking is a great example of why that’s the case. It blends auto-battling with deck building, which brings a fresh experience. Each run in the game challenges you with pushing across the board towards the top-right corner, where a boss battle awaits. Along the way, you’ll need to manage resources, merge units using monuments, and pick new recruits from traders. The game mechanics are easy to understand, and once you get the hang of everything, you won’t leave this game alone for even a minute.

Claim Necroking on the Prime Gaming.

Game NameNecrokingRelease Year2024DeveloperKORO.GAMES

4. Marvel’s Midnight Sun

Marvel’s Midnight Sun. (Image via 2K)

Marvel games have been all the hype in recent months thanks to Marvel Rivals. However, there’s one title that you might not know about: Marvel’s Midnight Suns. This is a tactical RPG that brings our favorite heroes like Wolverine, Iron Marvel, Captain Marvel, and many others in a strategic adventure. Although the combat is centered around turn-based battles, you’ll have to choose and manage each hero’s abilities. It’s a must-try for all those Marvel fans out there who want something new.

Claim Marvel’s Midnight Suns on Prime Gaming.

Game NameMarvel’s Midnight SunsRelease Year2022DeveloperFiraxis Games

5. Filthy Animals: Heist Simulator

Filthy Animals: Heist Simulator. (Image via Pewter Games Studios)

Filthy Animals: Heist Simulator is a co-op experience for four players, where you work under Tony with a crew of animal thieves. Your job? Go out and steal. Sometimes, you’ll just have to steal cash, and other times, you’ll literally steal nuclear items. In this game, madness increases with every heist. Each successful heist levels up your crew, which will help you unlock a bunch of rewards.

Claim Filthy Animals: Heist Simulator on Prime Gaming.

Game NameFilthy Animals | Heist SimulatorRelease Year2023DeveloperPewter Games Studios

6. Labyrinth City: Pierre the Maze Detective

Labyrinth City: Pierre the Maze Detective. (Image via Pixmain)

Who doesn’t love some indie games? If you’re itching to try something new, then Labyrinth City: Pierre the Maze Detective is definitely worth downloading from Prime Gaming. This is a 2D adventure that tasks you with guiding Pierre through mazes as he chases down Mr.X, who has stolen a stone from the museum. It’s your job to help Pierre find him and reclaim it. The game starts off simple, but as you progress, you’ll realize the puzzles get trickier.

Claim Labyrinth City: Pierre the Maze Detective on Prime Gaming.

Game NameLabyrinth City: Pierre the Maze DetectiveRelease Year2021DeveloperDarjeeling

7. Silver Box Classics

Silver Box Classics. (Image via Strategic Simulations)

Gamers who have played the classic Dungeons & Dragons titles will be glad to know that Silver Box Classics is available on Prime Gaming right now. This is a collection of the four iconic games, which give you the classic experience without any changes. Even if you’ve never touched this genre before, think of it as something similar to the original Prince of Persia gameplay. Each title here offers its own challenges, which makes this package worth your time.

Claim Silver Box Classics on Prime Gaming.

Game NameSilver Box ClassicsRelease Year2023DeveloperStrategic SImulatons

8. City Legends: The Ghost of Misty Hill Collector’s Edition

City Legends: The Ghost of Misty Hill Collector’s Edition. (Image via Do Games Limited)

One hidden gem that has found its way to Prime Gaming this month is  City Legends: The Ghost of Misty Hill Collector’s Edition. Here, you’ll face a bunch of ghosts and dark mysteries as you work to rescue your friend Michael. This game features dialogues that shape the story, a mix of puzzles and mini-games, and even a bonus chapter that expands the story into uncharted lands. The gameplay here isn’t anything complex, just simple exploring rooms, collecting items, and unlocking locks.

Claim City Legends: The Ghost of Misty Hill Collector’s Edition on Prime Gaming.

Game NameCity Legends: The Ghost of Misty Hill Collector’s EditionRelease Year2023DeveloperDo Games Limited

9. Tin Hearts

Tin Hearts. (Image via Rogue Suns)

Tin Hearts is perfect for folks who enjoy games that are both cozy and challenging. The adventure unfolds through a series of puzzles tied to a story of a brilliant inventor. You’ll have to guide a troop of toy soldiers across dozens of rooms and levels, and manipulate objects to direct their path. At times, you’ll even have to manipulate time and space! With over 50 challenges, there’s no shortage of things to keep you occupied.

Claim Tin Hearts on Prime Gaming.

Game NameTin HeartsRelease Year2023DeveloperRogue Sun

10. Besiege + The Splintered Sea DLC

Besiege. (Image via Spidering Studios)

And finally, we have a familiar face from last month’s Prime Gaming list: Besiege. While it’s often seen as a physics-based puzzle game, it plays more like a Hitman title. Each level presents you with a target, and you’re free to solve it as you see fit. If you want a challenge, you’re free to complete the level using as few pieces as possible. However, if you want fun, you can craft your solution. The art style, sound, and, of course, explosions are fantastic too.

Claiming Besiege on Prime Gaming.

Game NameBesiegeRelease Year2020DeveloperSpiderling Studios

With that said, what’s your favorite Prime Gaming title this month? Let us know in the comments below.
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