Top similar games like Ostrom:
Ostrom $12.99
Realistic point defense game with physical interactions.
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TO4: Tactical OperationsFREE
Tactical Operations is a round based fast-action first-person shooter with classic controls. Built using the Unreal Engine 4 – Welcome to TO4!
Hell Let Loose$49.99
Join the ever expanding experience of Hell Let Loose - a hardcore World War Two first person shooter with epic battles of 100 players with infantry, tanks, artillery, a dynamically shifting front line and a unique resource based RTS-inspired meta-game.
Total Tank Simulator$19.99
Commander in the ranks. Soldier at heart. Choose a faction and deploy and command your army into massive physics-driven WWII battles to the last man standing. Destroy everything on sight with an insane amount of units that will behave tactically.
Gallery X$6.99
"Will you be the next one to get out of here alive?" GalleryX, a horror game that focuses on observation and memory.In the dim environment, there are 86 anomalies, 2 endings, different experiences,waiting for you to explore.Please watch out for enemies.
Tank Universal 2$9.99
Inspired by the shapes and spaces of Tron and the gameplay of Battlezone, the sequel to 'Tank Universal' has arrived! Take control of your virtual tank and confront the forces of Gorgon in explosive first person 3d tank combat.
Beyond The Wire$9.99
Set in the muddy trenches of WW1, Beyond The Wire is a 50v50 multiplayer FPS that immerses players in the desperate & brutal circumstances of the Great War. Featuring an arsenal of historic weapons, ten massive maps, ten playable factions, era-specific tanks, & a brutal melee combat system.
Gunsmith$19.99
Build up your own arms manufacturing company. Find your factory, buy resources, produce a wide range of military equipment to sell to the highest bidder. Good or bad? That's up to you, who you do business with is your choice. Don't ask, don't tell, get paid. After all, war is about making money.
Call to Arms$14.99
Call to Arms offers an innovative mix of real-time strategy and 3rd, as well as 1st person controls. Set in the time of modern warfare, the game offers realistically modeled vehicles and heavy weaponry. Command your troops to victory or fight by yourself in the 3rd or 1st person action mode.
Angels Fall First$17.99
From commanding the battle standing on the bridge of your flagship all the way down to tactical infantry firefights - AFF brings together all the combat you ever wanted in a rich science fiction setting. Boarding, pilotable capital ships, deep weapon customization and full AI support included!
Tim Climpy's Warfair$4.99
A military FPS shooter with a focus on fun things for fun people!
Guns, Blocks, and Steel$9.99
A tactical multiplayer FPS created by a solo developer as a passion project. Featuring a fully destructible, block-based environment. Play multiplayer PVP/co-op or singleplayer with bots.
Extreme Bus Driver Simulator$0.99
Are you ready to become an experienced bus driver? Experience the thrill of transporting passengers in a realistic city with Extreme Bus Driver Simulator! Get passengers to their destination on time and safely, earn rewards and customize your bus.
Tank Online: War Shooting Simulator$0.99
Enjoy the thrilling action of tank warfare in Tank Online! Experience unique tank game with stunning visuals and realistic physics. Join the fight now!
The Red$4.99
Debt-ridden and desperate? Get out of the red and into The Red! Join the Red Horizons on Mars as an Extraction Security Associate and pay off your debts by defending your way to wealth in this ironic first-person-shooter/tower-defensy/existential-horror adventure!
Vacant Planet$2.99
You awaken on an unknown planet that has been devastated by a virus of some kind. Scavenge gear and get ready for a battle of survival. Do anything you can to live and find out the secret behind the tragedy of your new home. and find out what's wrong with it.
Death in the Water 2$14.99
Dodge and carve your way through swarms of terrifying sea creatures controlled by Death, a vicious giant mind-controlling Kraken that haunts your every move. Scavenge for hidden treasure to unlock weapons, and upgrades to help you in your fight for survival. Every dive reveals a new nightmare.
Heroic Armored Company$16.99
Heroic Armored Company is a modern tank warfare game with advanced graphics technology, realistic battlefield environment and huge scenario map, which can bring players an exciting battlefield experience. The game is currently divided into story mode and mission mode.
18 MINUTES$14.99
18 Minutes is a single player FPS that combines stealthy precision with heart-pounding action. Engage in intense firefights, strategically infiltrate enemy base, and make split- second decision to outmaneuver enemy. Get ready for a gaming experience that offers the best of stealth and FPS action
FUBG: FIGHT UNKNOWN BATTLEGROUND$4.99
FUBG is a Multiplayer Shooter Game by GameX with Seven Different Game modes. 1. Team Death Match 2. Capture the Flag 3. Conquest 4. RUSH 5. Kill Confirmed 6. Free For All And 7. Search & Destroy. Player can Play strategic battles across diverse maps and various combat styles to claim victory.
Sentinel Agency$29.99
Sentinel Agency is a first-person survival shooter with dinosaurs! As a special investigator from the Sentinel Agency, you go on a murderous adventure on a dinosaur theme park island! Shoot, sneak, uncover secrets, survive!
Meatgrinder$2.99
MeatGrinder is a mech-shooter themed shooter where you have to pilot and assemble your own mech on a desert planet to fight against ferocious dinosaurs from outer space.
Hold Your Own$14.99
A single player open world sandbox, crafting and survival FPS game set in a multi-island land where you'll fight to survive. Build your base, hunt and craft to defend yourself from aggressive wildlife, enemies or friends. Do you have what it takes to Hold Your Own?
Sker Ritual$24.99
An intense round-based zombie survival FPS, play solo or co-op. Shoot your way through relentless waves of vicious horrors with high-octane objectives, upgrading steampunk weapons, collecting Celtic God powers, and surviving the onslaught of the Quiet Ones.
Haunt Monster$9.99
Haunt Monster is a FPS Action Roguelike game in a random generated environment. Build, defend and survive waves of zombies, monsters and aliens. Play solo or co-op with a friend to survive.
Titanic: Fall Of A Legend$9.99
Step aboard the RMS Titanic and experience the last moments of the most famous ocean liner to have ever been built. This unique experience provides you with the tragic events in extraordinary detail that caused the Titanic's demise.
Danger Horizon$9.99
Danger Horizon is a multiplayer, first-person shooter game made using Unreal Engine 5. The game features realistic gunplay, and advanced blood and gore features that everyone can enjoy.
CyberWave$9.99
A wave based arcade shooter with different elements from other genres like hero shooters and incremental games. Fight waves of enemies to earn money to get better gear and upgrades to help you the next time you go to fight them.
WWII OnlineFREE
WW2 Online is a completely player-driven simulated wargame with a first-person tactical and strategic layer. You’ll fight a global war on a single worldwide server capable of holding thousands of players. Unmatched combined arms gameplay on a massive scale, now with built-in voice comms.
Invasion Machine$18.99
Modern-warfare RTS/sandbox game inspired by the real conflicts in the Middle East. Fight a counter-insurgency war, protect the civilian population, casevac your wounded and decide how the world sees your struggle. And remember - no one gets left behind.
Make It In Time$4.99
Alicia Hudson and her fellow survivors must find a way to escape a dying planet after their spaceship crashes. This third-person shooter action game features RPG elements, a variety of weapons, fast-paced combat, massive enemy waves, challenging defend the city missions & much more..
恶搞赛车 湿身吧！ Splash To Wild Kids$1.99
Fresh, unknown, challenging, interesting and spoofing Unprecedented game mode Simple style, free choice, convenient and humanized interactive design. Simple and easy game experience.
PolyGunner$0.99
PolyGunner is a simple single player FPS game. You have 2 weapons, but a limited amount of ammo. Battle with incoming enemies, collect ammo from enemies, prepare for the next battle to come.
The Ball$9.99
As a swashbuckling archaeologist, unlock the mystery of the ancient ruins that have been hidden for centuries and discover a mysterious artifact, a gold and metal shelled Ball.
PEE WAR！$1.99
Play pee Superman and destroy the city and the forest! Destroy everything in your sight and avoid the human army attack!
Silica$19.99
Silica blends FPS and RTS in epic, photorealistic battles. Choose to fight on the ground or command from above as humans or aliens. Dive into thrilling multiplayer combat or master strategic command. Are you ready to survive and conquer?
Sandbox World$4.99
Welcome to the Sandbox World! Here, you bring your ideas to life: create tanks, airplanes, ships, and anything else – with over 120 unique blocks at your disposal. Engage, defend, and showcase your masterpieces in tense multiplayer battles that await you!
E.E.R.I.E2$7.99
E.E.R.I.E 2 is a tactical shooting game. In the modern Gensokyo, play the role of fairy Luna, and uses a variety of modern light weapons and tactical equipment to join in a war that decides the fate of Gensokyo.
Recordance$3.99
THE ROBOTS ARE COMING! Unleash your arsenal of innovative arm mounted weapons and vehicles to defeat the robot hoards. Fight across multiple mission types and environments In this fast paced single player shooter.
MY HOUSE$4.99
3D Action Shooter, Tower Defence Game. Kill monsters. Buy items for defence. Save Your House.
Squad 44$29.99
Team up and join the frontline in Squad 44, the most authentic tactical WW2 shooter. Experience ruthless realism with an immense arsenal of faithfully recreated weapons and vehicles across massive WW2 battlefields.
War Dust VR: 32v32 Battlefields$24.99
Join the fight in War Dust VR, the ultimate FPS shooter with immersive VR gameplay. Dominate expansive battlefields with diverse vehicles, exciting mechanics, and strategic control points. Join your team and become a champion of this multiplayer war today!
Panzer Knights$24.99
Panzer Knights is a single-player, story-driven tank shooter where you, a German Tank Commander, lead your platoon of tanks across Europe circa WWII. Experience battles spanning the entire war as you strategize, battle, and best your enemies!
Trench Defender$1.99
An action-packed FPS where you defend your trench against waves of attacking enemies by utilizing a large selection of modern (and not so modern) military weapons, features both single-player and two player online multiplayer (peer-to-peer).
Aussie Clowns At WarFREE
Aussie Clowns At War Dec 15, 2021 a free humorous fast paced multiplayer pc fps war shooter with some favored old school qualities like "COD MW2 kil streak announcer and Vietcong CTF" & 5 game modes 20 maps, awsome weapons classes including flame thrower, easy secure player hosting.
Snowballer$0.99
Reminisce your youthful days, or just be actively malicious in this bloody serious, fast-paced First-Person Snowball Fight / Sled Racing Simulation. Sandbox elements: Build your own snow forts, simulate NPC battles, Survival challenges and Time Attack Downhill Racing
Teardown$29.99
Prepare the perfect heist in this simulated and fully destructible voxel world. Tear down walls with vehicles or explosives to create shortcuts. Stack objects to reach higher. Use the environment to your advantage in the most creative way you can think of.
Bionite: Origins$11.99
Bionite: Origins is a Tactical Shooter game based on vehicles. The game uses a combination of Aircraft and Tank physics to produce a unique gaming experience based on hover propulsion. Players can command pilots and build bases in 1 vs 1 team games or with up to 8 other players.
Vertical Strike Endless Challenge$4.99
A flight-based action game designed to be easy to pick up and enjoy right away, and be playable over short timeframes. Make use of a range of weapons and achieve dangerously high levels of mobility by disabling your Alpha Limiter to spear your way through waves of enemy attacks.
SimplePlanes VR$9.99
SimplePlanes VR is a flight sim with an ever-expanding collection of hand-crafted aircraft to download and fly for free. Airplanes, helicopters, cars, boats, and more are available and new crafts are added every day.
Beach Invasion 1945 - Pacific$9.99
Beach Invasion 1945-Pacific is a World War II FPS game where players defend fortified Pacific islands from invading armies of troops, tanks, and planes. Play on your on own or COOP while using iconic Japanese and American WWII weapons and prepare your defenses with mines, explosives, and more!
Otherworldly Air Gunship$1.99
This is a fun shooting game that includes tower defense elements. You will control an air gunship equipped with three main types of weapons and several powerful special weapons. And leap your army to defeat thousands of monsters from other worlds.