Sigma Impact
Released Aug 2021
A physics-based 2D action roguelite set in a dungeon of glass. Master intense combat, be immersed in captivating visuals with adaptive music and sound design tailored to your gameplay.
97% positive · 102 reviews
Done
All announced content has been released
Medium confidence
Done
All announced content has been released
Medium confidence
Where to buy
Steam $4.99
Can't confirm — worth a look
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Evaluation
Sigma Impact is a solo-developed physics-based roguelite that launched on August 11, 2021. The developer shipped one major post-launch update on December 23, 2022, which added three new weapons, a graphics overhaul, new music tracks, balance improvements, and a Daily Mode. This update was accompanied by a small bug fix patch on December 25, 2022 — the last developer communication on record.
In the December 23, 2022 update post, the developer described the update as "a good stopping place" and acknowledged limited development time due to personal commitments (working two jobs, single parenting). While they expressed enthusiasm for future ideas — more enemies, perks, weapons, and level variety — these were aspirational thoughts rather than specific commitments, and no follow-up content was announced or released in the roughly three and a half years since that post (through June 2026).
The developer has a single clear post-launch major update in their history, giving no recurring cadence to suggest more content is on the way. The last communication of any kind was the December 25, 2022 bug fix patch. With no announced future content, no unreleased DLC, no roadmap, and silence extending well beyond what any reasonable update window would suggest, the game is best understood as a complete, finished product as of December 2022.
Evidence
Major update released adding 3 new weapons, graphics overhaul, new music, balance rework, and Daily Mode. Developer described it as 'a good stopping place' and acknowledged limited time to work on the game.
Developer described the upcoming update as 'more like a 1.0 release out of Early Access' — a significant refinement milestone — and confirmed limited time to work on the game.
Media
Details
Developer
Publisher
John Bishop
Achievements
16
Platform
Windows
Controller
full support
Steam Deck
Verified
Players
Single-player · Multiplayer · Co-op · PvP · Local/Split Screen
About this game
Unleash Your Power in the Explosive World of Sigma Impact!
Welcome to Sigma Impact, a physics-based combat game that challenges your skill, timing, and creativity. Master momentum and positioning to execute devastating attacks with a variety of unique weapons, each with its own special abilities.Embark on a rewarding journey as you conquer room after room of the glass dungeon, unlocking powerful weapons and perks along the way. Choose from the mighty Hammer, the explosive Mace, the precise Spike, the versatile Jet Hammer, the innovative Yo-yo, the healing Hexagon, the deadly Lance, and the defensive Claw. Customize your playstyle and adapt to overcome the enemies and obstacles along your path to the final boss.
Sigma Impact offers an immersive experience with dynamic physics, strategic combat, and captivating visuals. Beginners and veterans alike will find a challenge in this adrenaline-pumping "pick up and play" indie gem. Sharpen your skills in the training room, perfect your weapon of choice, and brave the depths of the glass dungeon in your quest for mastery and high scores.
Key Features:
- Unique Physics-Based Combat: Master the art of swinging your hammer with momentum, and experience the intensity of strategic, physics-driven battles.
- High Replay Value: Embark on countless runs with procedurally generated levels, a diverse array of weapons, and exciting perks that will keep you coming back for more.
- Local Co-op and PvP Modes: Team up with friends for cooperative play or challenge them in exhilarating player-vs-player battles.
- Immersive Dynamic Soundtrack: Get lost in the game's dynamic audio experience, with a real-time composed soundtrack that adapts and reacts to your every move, enhancing the intensity and excitement.
- Stunning Visuals: Dive into Sigma Impact's vibrant world, brought to life with striking graphics and a captivating aesthetic.
- Challenge and Mastery: Overcome a steep learning curve, unlock new modes and weapons, and push your skills to the limit in this "easy to learn, hard to master" experience.
Master the Arsenal: Unleash the Power of Physics-Based Weapons!
- Hexagon: Stun and heal with charged strikes or launch ranged flashbangs to control the battlefield.
- Hammer: Unleash devastating charged impacts and master the timing for maximum damage.
- Mace: Cause spectacular explosions with charged melee attacks or lob it like a grenade for massive blasts.
- Spike: Take aim and fire explosive bullets for precision strikes, scoring bullseyes for extra damage.
- Jet Hammer: Spin with jet engines and launch powerful jet charges for remote-controlled devastation.
- Yoyo: Fling it out and control its speed, unleash charged explosions for temporary damage buffs.
- Lance: Perform precise thrusts and use charged lasers for long-range precision or explosive lunging strikes.
- Claw: Defend with a shield-like shape, deliver shield bashes, and boost melee strikes with charged lasers.
Players' Verdict: Unleashing Praise for Sigma Impact!
Sigma Impact has been receiving overwhelmingly positive reviews from players who appreciate its satisfying physics-based gameplay, engaging mechanics, unique combat, and fantastic visuals. The game has been compared to classics like Hammerfight, with many players noting the high skill ceiling and replay value. The controls may be challenging at first, but players find them rewarding once mastered. The game offers single-player, local co-op, and PvP modes, catering to various preferences. The dynamic music and sound design are also praised, enhancing the immersive gameplay experience.
While the game is considered short, players find it well worth the price and express hope for additional content in the future, such as more levels, enemies, and weapons. The developer's dedication and responsiveness to feedback is also appreciated, and the game is highly recommended for its price. Overall, Sigma Impact is seen as a polished, satisfying, and addictive indie gem that provides hours of fun.
Pros:- Satisfying physics-based gameplay
- Engaging mechanics and unique combat
- High skill ceiling and replay value
- Fantastic visuals and sound design
- Single-player, local co-op, and PvP modes
- Responsive and dedicated developer
- Great value for the price
Cons:- Short game length
- Limited content (levels, enemies, weapons)
- Challenging controls may have a learning curve
- Hexagon: Stun and heal with charged strikes or launch ranged flashbangs to control the battlefield.
Are these done yet?
Last evaluated Jun 23, 2026
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