How do I activate my Abyssus Steam key?

1. Open the Steam client 2. Click on "Add a Game" in the bottom left corner 3. Select "Activate a Product on Steam" from the dropdown 4. Enter the code and follow any on-screen instructions

How fast will I receive my key?

Your Abyssus key is delivered instantly after purchase. It will appear in your GameBoost account dashboard immediately after your payment is processed with no waiting period.

Is it safe to buy game keys on GameBoost?

Yes. GameBoost is a verified marketplace with over 19,000 Trustpilot reviews and an Excellent rating. Every purchase includes instant delivery, 3% cashback in GB Coins, and 24/7 live chat support.

What is your refund policy?

You are eligible for a refund if the key has not been revealed and a valid refund reason is provided and approved by GameBoost, if the delivered key is not as described (wrong edition, wrong platform, or cannot be activated in your country despite being listed as compatible), or if the key is invalid or duplicated. You are not eligible for a refund if the key has been revealed and redeemed successfully, if the key works correctly and matches the product description, or if you do not like the game or changed your mind. Contact GameBoost's 24/7 live chat support for any refund requests.

Is this a Steam key or an account?

This is a Steam key, a unique digital code that activates Abyssus on your own existing Steam account. Once activated, the game is permanently added to your library and is yours to keep forever.

Is Abyssus on Game Pass?

Yes. Abyssus launched day-one on Xbox Game Pass on June 25, 2026 and is currently available to subscribers at no additional cost. If you do not have a Game Pass subscription, GameBoost offers Xbox Game Pass gift cards so you can subscribe and start playing today.

Is Abyssus solo or co-op?

Abyssus supports both solo and co-op play. Solo players can complete the full game alone, though the experience is designed around co-op teamwork and is significantly more dynamic with a full squad. Online co-op supports up to four players simultaneously with full crossplay between PC and Xbox.

Does Abyssus have crossplay?

Yes. Abyssus supports full crossplay between PC via Steam and Xbox consoles. Players on both platforms can join the same session without any platform restrictions.

How much content does Abyssus have?

The current version of Abyssus includes 70+ hand-crafted levels procedurally sequenced across each run, 9 weapons with 54 weapon mods and 140+ Ancient Forge mods, 250+ Charms and Blessings, 36 enemy types, and 12 bosses. The June 2026 update significantly expanded the game beyond its August 2025 launch content, and the developers have committed to continued post-launch support.

What are the Abyssus system requirements?

Minimum specs require an Intel Core i7-8700K or AMD Ryzen 5 1600X, 8 GB RAM, an NVIDIA GeForce GTX 750 Ti or AMD Radeon R7 360 with 2 GB VRAM, and 10 GB of storage on Windows 10. Recommended specs call for an Intel Core i7-11700K or AMD Ryzen 7 3700X, 8 GB RAM, and an NVIDIA GeForce GTX 1650 Super or AMD Radeon RX 5600 on Windows 11.

Buy Cheap Abyssus Steam Key

Q: What regions does this key work in?

This key is available in global region. If you are unsure whether your country is supported, check the activation details on the product page before completing your purchase.

Trailer, Artwork & Screenshots (15)

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Description

Gather your friends and dive into Abyssus' fast-paced multiplayer shooting action. Fight through gorgeous hand-crafted levels in a roguelite adventure that will put your tactical skills to the ultimate test. Wield powerful brine-powered weapons and refit them with ancient technologies to gain an edge over your foes. Obtain divine blessings to enhance your firepower with elemental and mystic effects.

In a world powered by brine, a rare and powerful substance only found in the deepest fathoms of the sea, your team of daring brinepunk explorers is recruited to claim a massive deposit located beneath the ruins of an ancient civilization. However, your mission becomes a frantic battle for survival when the sunken kingdom’s corrupted inhabitants rise against you.

Will you survive to see the surface again, or will the abyss claim your life?

In Abyssus, cooperation means survival. Team up with fellow Brinehunters and carefully choose synergic loadouts, skills, suits, and weapon mods. Work together and fight through a merciless roguelite gauntlet, where no run is the same as the last.

Wield highly customizable, brine-powered armaments and infuse them with the might of ancient Gods. Master 8 weapons and 45 weapon mods, upgrading your skills and suit as you face the underwater kingdom’s mutated guardians.

Run after run, you’ll access more and more upgrades and tactical choices, but firepower alone won’t save you from the denizens of the depths. Mastering Abyssus's visceral gunplay and fast-paced action will require tactical coordination, positioning skills, and cohesive teamwork.

The world of Abyssus is richly atmospheric and steeped in mystery. What untold secrets lie in the sunken kingdom? What gives brine its inexplicable powers? Can we weaponize an anglerfish? The answers lie deep down below…

Visceral, fast-paced FPS action, with top-notch weapon feel and combat responsiveness
Up to 4-players co-op
Roguelite meta progression with advancements, rewards, and unlocks
70+ hand-crafted levels, procedurally sequenced to make every run a new experience
9 different weapons customizable with 45 weapon mods
Over 140 Ancient Forge mods to further empower weapons and skills
Extensive pre-run and in-run character customization options
36 different enemies and 12 bosses that will put your skills to the challenge
Over 250 Charms and Blessings to craft the perfect build

Buy Abyssus Steam Key

Get instant access to one of 2025's most acclaimed co-op roguelite shooters with a cheap Abyssus Steam Key from GameBoost. Your key will be available in your GameBoost account dashboard immediately after purchase, ready to activate and download via the Steam client. Every purchase on GameBoost includes 3% cashback in GB Coins and 24/7 live chat support, backed by over 19,000 verified Trustpilot reviews. From new releases to classic titles, GameBoost offers all Steam keys on GameBoost across the full range of PC gaming.

About Abyssus

Developed by DoubleMoose Games and published by The Arcade Crew and Dotemu, Abyssus launched on PC on August 12, 2025 before receiving its console debut on June 25, 2026 alongside a major content update that significantly expanded the game. Set in an alternate 19th century world where civilisation runs on brine — a rare and powerful substance found only in the deepest ocean fathoms — the game follows a team of Brinehunters recruited to claim a massive brine deposit beneath the ruins of a sunken ancient kingdom inspired by Atlantis, Inca, and Aztec mythology. When the kingdom's corrupted inhabitants rise against them, a straightforward extraction mission becomes a frantic battle for survival across the ruins of a civilisation that predates recorded history.

The game's roguelite structure sends players through 70+ hand-crafted levels procedurally sequenced to ensure no two runs feel identical, facing 36 enemy types and 12 bosses across increasingly hostile environments. Nine distinct weapons — each customisable with 54 weapon mods and further enhanced by over 140 Ancient Forge mods and 250+ Charms and Blessings — create a build variety that rewards experimentation and cooperation between squadmates. The pre-run loadout system lets teams design synergistic combinations before each descent, while in-run upgrade choices force real-time decisions about how to evolve a build under pressure. Full crossplay between PC and Xbox ensures the co-op playerbase is as large as possible.

Abyssus holds a Metacritic score of 71 on PC and a Very Positive rating on Steam with 87% positive reviews across more than 3,300 players, with particular praise for its gunplay responsiveness, atmospheric world-building, and the depth of its weapon customisation system.

Abyssus is currently available on Xbox Game Pass, having launched day-one on the service on June 25, 2026 for Xbox consoles. If you are already a subscriber you can access it through your membership at no additional cost. If you do not have Game Pass, GameBoost offers Xbox Game Pass gift cards as an alternative way to get started.

Region & Activation

This game key is available in global region. If you are unsure whether your country is supported, check the activation details on the product page before purchasing.