Screenshots
Watch trailer on Steam ↗Stack Up
The Platypus · Published by The Platypus
Content notice: This game contains depictions of realistic combat involving firearms and tactical operations. Players engage in gunfights against other players in a modern combat setting. There is no depiction of sexual content, sexual violence, or self-harm. Violence is presented in a grounded and non-exaggerated manner, without extreme gore or graphic dismemberment.
Last updated 28 Sept 2026
A multiplayer tactical shooter focused on realistic weapon handling and special forces tactics. Work with your team, master authentic firearm mechanics, and fight through intense close-quarters combat across multiple game modes.
Action, Adventure, Indie, Simulation, Strategy, Early Access · More free games
About this game
Step into the world of modern special operations combat.
This multiplayer tactical shooter focuses on teamwork, positioning, and weapon mastery, delivering intense firefights inspired by real special forces engagements.
Victory does not belong to the fastest trigger finger alone.
Every encounter rewards players who understand movement, coordination, and the flow of combat.
Authentic Weapon Manipulation
Many shooters simplify or omit real firearm operations for convenience.
This game brings those elements back to deliver a more grounded and authentic experience.
Players must manage actions such as slide manipulation, hammer control, and realistic reload procedures. Mastering these mechanics is not just about efficiency—it reflects the mechanical depth and craftsmanship of real firearms.
Our goal is to capture the true feel, rhythm, and character of handling real weapons, and bring that experience into gameplay.
Real Special Forces Tactics
Survival depends on more than just aim.
The game rewards players who think and move like trained operators.
For example, in tight interiors, using a High Ready stance allows for faster reaction, while in more open spaces, a Low Ready stance provides better visibility and control. These are fundamental principles drawn from real-world tactical practices.
The game also features a hand signal system inspired by real special forces communication, allowing players to coordinate with teammates even without voice chat.
Beyond these examples, many additional details inspired by real tactical environments are built into the game. Some are immediately visible, while others are left for players to discover through experience.
Built With the Community
The game is actively in development and will continue to expand with new maps, modes, and systems.
We believe the best tactical experiences are built together with the community.
Player feedback will play a key role in balancing gameplay, refining mechanics, and shaping future updates.
System Requirements
Will my PC run this? →Minimum
- Requires a 64-bit processor and operating system
- OS: Windows10
- Processor: Intel Core i7-9700
- Memory: 8 GB RAM
- Graphics: NVIDA GeForce GTX 1070
- DirectX: Version 12
- Storage: 6 GB available space
Recommended
- Requires a 64-bit processor and operating system
- OS: Windows11
- Processor: Intel Core i7-12700
- Memory: 16 GB RAM
- Graphics: NVIDA GeForce GTX 3080
- DirectX: Version 12
- Storage: 12 GB available space
Supported Languages
Latest news
AnnouncementsOfficial
New Map 'Hostage' Now Live!
Read full article on Community Announcements (dev)AnnouncementsOfficial
Second Note: Special Forces VS Terrorists
Hello, this is the Stack Up development team.This is our second developer note.Following the previous note, we would like to talk a little more about our development process.When we first came up with the idea for the game, the concept was about determining superiority between special forces units. In other words, among the many special forces units around the world, which one is the strongest?However, there is already an excellent game based on that concept, and from a practical standpoint, it was difficult to create a truly different gameplay experience between each special forces unit.Of course, we could have added unique traits to each unit and created differences between them, just like existing games do. But even setting aside the issue of not being sufficiently different from those games, we had a more important question: would that approach really allow us to express the believable special operations fantasy we were aiming for?We were worried that, in the end, it might simply become a hero shooter wearing the skin of special forces.After several days of discussion, we eventually decided on the structure of special forces versus terrorists. In one sense, it evokes the nostalgia of classic games, while at the same time it may feel somewhat obvious or familiar. But a classic cliché is also something that has been loved for a long time. We like it too.However, that was not what we were truly concerned about.If the CT side carries the fantasy of special forces, what kind of experience should the other side provide? We were also concerned that, if handled poorly, it might appear as if we were endorsing terrorism.At first, we considered allowing the defending terrorist side to place various objects around the map. Of course, that kind of system is possible. However, it would increase the number of mechanics players have to learn, and we wanted to minimize anything that could interfere with gunfighting.We felt that the only things that should be able to kill a playe...Read full article on Community Announcements (dev)AnnouncementsOfficial
New Map ‘Library’ Now Live
Read full article on Community Announcements (dev)Community & EventsOfficial
Stack Up Coming to Steam Next FEST!
Operation BriefingStack Up is confirmed to participate in Steam Next Fest. The demo operation is about to begin, and we look forward to having all operators join the field and share valuable mission feedback with us.Whether it is gameplay experience, balance adjustments, issues, or suggestions, our development team will carefully review every report.We have also prepared three special events for everyone participating in this operation.Event details are as follows: 3 EventsThree events run throughout the festival.Chase the score, capture the moment, and beat the developer.Each runs independently — you can join and win in all of them.The Full ScheduleAll dates and submission deadlines are in Pacific Time (PST).Maps open in sequence across the festival.DETAILSMETHODDATESteam Next Fest BeginsAll events openJun 15 (Mon)10 AM PST · StartStorage Map OpensFree-for-All (FFA)Maps in rotation may change depending on operationsLibrary Map OpensCT 3 vs TR 5Maps in rotation may change depending on operationsHostage Map OpensCT 5 vs TR 3Maps in rotation may change depending on operationsSteam Next Fest EndsAll events closeJun 22 (Mon)10 AM PST · EndResults AnnouncedAll results & winnersJun 25 (Thu)10 AM PST · RevealExplore the EventsPlay the Stack Up demo during Steam Next Fest and join our Discord— anyone can take part and win rewards!EVENT 1. Tactical TrialGo for the top score on the featured maps.Rewards go to the highest cumulative scorers on each map.Every submitted record is verified and tallied by our team.How to Join:Play the open maps and chase the top scoreCapture a screenshot of your final score screenSubmit to the Discord #tactical-trial channelReward:TIERAWARD TITLEPRIZEOverallBattle field Overlord (Overall #1 in 3 maps)Steam Gift Card $301stMap Conqueror (Ranking #1 in each map)Steam Gift Card $202ndElite Operator (Ranking #2 in each map)Steam Gift Card $10RandomLucky Deploy (Random draw,3 persons from each map)Steam Gift Card $5*Map prizes are tallied once per map ...Read full article on Community Announcements (dev)AnnouncementsOfficial
Stack Up Game Guide
Everything on the line in close combat'Stack Up' is a tactical multiplayer FPS focused on close-quarters battle (CQB).Built around the contrasting roles of a counter-terror unit (CT) and terrorists (TR), each side fights using its own gear and the surrounding environment.With guidance from a former special-forces operator, weapon handling and tactical movement are recreated realistically, delivering a teamwork-driven experience.OverviewA counter-terror unit (CT) and terrorists (TR) clash in tight interiors, each with their own gear and objectives. Whether you carry equipment like night-vision goggles or smoke grenades often decides the edge in a firefight, while watching blind spots and timing your entry determines who takes the round.Weapon handling and tactical movement were recreated realistically with guidance from a former special-forces operator. It is currently an beta build, so only some modes and features are playable.Game FeaturesGame ModesKey Board GuideMore Info: https://weplatypus.com/stackup/nextfestDiscord: https://discord.gg/6mUD8SFkFBRead full article on Community Announcements (dev)
