Top similar games like Ostrom:

Field of Honor is a single-player game that combines elements of first-person shooter and strategy, set in the Napoleonic Wars. You can take command of massive battles or engage as a single soldier to defeat the enemy in various game modes.

Eminus is a new Tactical FPS based on realism. Plan your next move carefully because there is no more room for mistakes. You need to finish the job.This is a difficult game. Don't run and gun.

Fight upon the Ravenfield together with your Blue allies! Take down those pesky Reds using helicopters, tanks, guns, and active ragdoll physics!

Armored War is a realistic tactical first-person shooter set in the realities of modern conflict. Take part in ground battles using a full arsenal of weapons and equipment

From one of the developers behind the original Rainbow Six® and Ghost Recon® games, comes a thinking-man's first-person shooter featuring in-depth character and weapon customization. Take your time. Think ahead. Get the job done.

Become a Medic - a true war hero. Survive the horror of the Pacific Front where bombs fall from the sky and rifle bullets cut the air. You are the last hope of your wounded companions. Your decisions will change the course of the battle, but not all of them will be easy to make!

Good Kill is an immersive FPS game where players take control of a door gunner in a military helicopter during the Vietnam War. Engage in intense combat across destructible environments, complete missions, and upgrade your helicopter and weapons to dominate the battlefield.

Operation Athena is a tactical first person shooter that takes inspiration from classic tactical shooters with updated modern mechanics. Take part as an operator of Athena Team solo or with up to 4 players against a global terrorist threat.

Join War Gun - an epic war game! This is the place where your skill and tactical skills will determine the outcome of the battle. Fight with players from all over the world, diversify your arsenal with weapons and prove your superiority on the battlefield. Are you ready for War Gun?

FPV Military Kamikaze Drone Simulator is an advanced and realistic early access game with kamikaze drones, grenade dropping, night vision and thermal imaging missions.

"Most Authentic Trench Warfare Simulator" is a fun, lowpoly style, team based, PvP, FPS/TPS game and a turn based tower defense game that is based on WW1 trench warfare background.

In the post-Soviet space, among the abandoned alleys of the city, broken houses, everyone is trying to survive, in search of food, weapons and ammunition, you will stumble upon enemies or friends who will later become your companions and support in these harsh conditions.

WWII Online: Chokepoint is an authentic F2P WW2 multiplayer tactical shooter, driven by teamwork and built-in voice comms. Jump in feet first with the US Airborne or join the Wehrmacht and fight to control iconic chokepoints as an infantryman in Europe between 1944-45. Are you ready for WAR?

Do you like hot dogs? How about horseshoes? Hand grenades? (everyone likes hand grenades) Anyway, we've got all that, and guns. SO MANY GUNS. So if you like ordnance, meat, and far too many groan-worthy puns, this is the VR sandbox game for you.

A Realistic Simulation with Manual Bolt Operation, Real Ballistics, High-Technical Fidelity, and Accurate 3D Models. Play freely on the SandBox Shooting Range or follow the Shooting Course on 3 different scenarios (Indoor, Outdoor, and Desert for long-range shooting with wind).

Have you ever been in a robbery and didn't have weapons to defend yourself and your house? Well now you can, with hold your houses you have a variety of weapons to use to help you defend yourself, your house and take on those unwanted robbers.

Ferocious Alpine warfare will test your tactical skills in this authentic WW1 FPS. Battle among the scenic peaks, rugged valleys and idyllic towns of northern Italy. The Great War on the Italian Front is brought to life and elevated to unexpected heights!

Get ready to blow up the tanks, shoot for the enemy tanks and claim victory. Accept your commander missions, firing to kill enemy tanks . You need be a tanks hero to win WW2 Battles.

Sacred Ember is currently a simple PvP fighter jet dogfighting game with realistic flight physics.

Army Troop 2: Modern Guns offers intense old-school online PvP battles with customizable soldiers, weapons, and gear. Engage in dynamic combat across diverse maps, with advanced bot integration for non-stop action. Challenge friends or AI opponents for the ultimate FPS experience.

Army Troop is an old-school PvP World War 2 online first-person shooter. Reminding you of the good old days World War games.

Rise of Liberty is a FPS single-player massive Revolutionary War battle simulator. Fire deafening cannons into the thick of the battle, stand in line formation and fire devastating volleys into the enemy. Gather your men for these monumental battles and defeat the enemy!

Warfield ,Singleplayer and Multiplayer War Game.

First person, fast paced shooter, focused on fluid and complex movement set in a stylized, futuristic world, where speed life, and the possibilities are endless

Infantry Assault: War 3D FPS, one of the variety of war games. Each new level has something new, different effects for shooting, a variety of soldiers, etc. The main goal of this game is to complete the level without leaving a single soldier alive.

A soldier who wants to take revenge of his father's brutal murder by Terrorists, Now he decided to destroy all the bases and camps of terrorists.

Step into 'Phantom Xcape' and become an international spy in a thrilling first-person stealth action game. Use advanced stealth tactics and espionage tools to navigate through challenging missions and make critical decisions that impact the story.

In the game "The Last Tiger," you will control the fate of four tank commanders during World War II! You will participate in the most bloody tank battles of the Second World War.

Project 1942: Dive into World War II with intense land, sea, and air battles. Teamwork is key in conquest mode. A nostalgic throwback to classic war games.