Summary
The base building and resource management mechanics of popular RTS games and city-builders are core design pillars of those genres. However, by tasking the player to defend against constant waves of enemies using elements from tower defense and survival games, the broad genre of “base defense” was born.
A base defense game often combines elements of base building (commonly found in RTS games and city-builders) with consistent waves of enemies to defend from. In these games, players often manage resources, build defenses, and manage an economy.
Updated on Jun 27, 2025, by Harry Ted Sprinks:The base-building and base-defense genres are often packed with high replay value and easy-to-learn gameplay mechanics. As a result, the genre is relatively saturated. However, plenty of games manage to stand out with their distinct visuals and innovative gameplay mechanics. The best base defense games, such as the recent Thronefall and games such as The Riftbreaker, come with new ideas and their own distinct style, offering a unique experience for veterans of the genre.
As one of the most popular base defense games,They Are Billionsisa steampunk-themedstrategy game in which players must build a base and defend it from truly massive hordes of undead. As well as the traditional defenses usually found in base defense games,They Are Billionsincludes a handful of units the player can train and control in real-time to help defend their base.
They Are Billionsfeatures a campaign with over forty missions, but the game really shines in its randomly generated survival mode.They Are Billionsis a harsh and unforgiving experience that can sometimes feel repetitive, but its impressive hordes of zombies make for a real spectacle, especially when they’re being mowed down by a well-designed defense.
Diplomacy Is Not An Optionhas players building a sprawling castle and defending it from hordes of enemies. The enemy sieges are made up of thousands of enemies that react when hit, with catapult stones and arrows sending enemies flying with fully simulated physics.
Diplomacy Is Not An Optiontasks players with managingfood and resources, burying their dead, training units, and preparing an organized defense before the enemies show up in droves.Diplomacy Is Not An Optionalso features magical spells, RTS elements, and an endless mode.
KeeperRLcombines the unforgiving gameplay ofold-school classic roguelikeswith the base-building and defense mechanics of games likeDungeon Keeper. InKeeperRL, players control units, gather and manage resources, and build a base to defend from other factions while also controlling their “Keeper” and trying to keep them alive; if the Keeper dies, the player loses for good.
The combat inKeeperRLworks very much like the turn-based combat of old-school roguelikes, while the base building and colony-sim elements of the game play out in real-time.KeeperRLallows players to invade and wipe out other factions through careful army building and management, but those factions will often come back to raid the player if they aren’t wiped out completely.
This unique roguelite game combines a variety of genres and gameplay mechanics to create a distinctive base-defense experience. WhileRatropolisis primarily a deck-builder, it tasks players with managing and playing their cards to build and defend a small base from waves of enemies.
Thanks to its fast-paced gameplay and deck-building mechanics,Ratropolishas a high replay value, allowing players to try out a variety of strategies. With over five hundred cards in the game, ranging from buildings and military units all the way to economic cards,Ratropolisfeatures plenty of variety that keeps things engaging throughout.
6YORG.io - Abstract Base Defense About Building Supply Chains
Steam User Rating: 89%
Developed by the creator ofShapez,YORG.iois an abstract base-defense game that may not look like much. However, beneath its simplistic surface is a deep and strategic game about building efficient supply chains to defend an ever-growing base from zombies.
The game’s structure is simple: survive as long as possible against endless waves of enemies. Players will construct and upgrade defensive towers, mine crystals, and build supply chains in order to feed ammunition to those towers.
This base-building survival game features action-RPG elements, tasking players with building a base on an exotic alien planet and defending it from a variety of nasty creatures with defenses and a physical playable character in the form ofa powerful mech.
The Riftbreakeris a visually stunning indie title that manages to pull off a careful blend of dynamic action-packed combat and strategic base building. The game features a full campaign to play, as well as a classic survival mode with randomized maps.
This city-building sim has players building a medieval fantasy town and expanding it into a sprawling city of happy citizens while defending it from vicious Viking raids and devastating dragon attacks. Both the Vikings and the dragons pose two very different threats, from pillaging the town and kidnapping citizens to burning down entire sections of the Kingdom.
InKingdoms And Castles, players don’t just have to worry about building defenses and armies, but also about the happiness of their people and the economy of their Kingdom. Every defense needs to be manned by a villager, and that villager needs to be paid. This strategic puzzle of expanding the Kingdom and managing resources while keeping everyone happy and defenses manned is a constant juggle that keepsKingdoms And Castlesengaging for a good while.
This addictive game combines factory/base building with army building, tower defense, and real-time strategy mechanics. InMindustry,players build factoriesin order to gather resources, make ammunition, and feed that ammunition into defenses that protect the factories from increasingly difficult waves of enemies.
Mindustryhas players building an abundance of conveyor belts and production lines in order to create defenses and build (and rebuild) armies in order to survive. This combination of factory building, automation, and tower defense/RTS makesMindustrya challenging experience that focuses on careful planning and micromanagement.
This minimalist base defense game features a cartoon flat-color art style and brilliantly simplistic gameplay that’s both highly accessible and mechanically deep.Thronefallcombinestower defense and RTS mechanicsto create a unique base defense game in which players fight off waves of enemies with a combination of their playable character and the units that they’ve built.
InThronefall, players have minimal control over their units, but the controls are so intuitive that it makes micromanaging them easy. Economy plays a large part inThronefall, with the longevity of a player’s defense usually boiling down to how well they can handle their little Kingdom’s economy. AlthoughThronefallis a very accessible game, it contains an abundance of difficulty modifiers that help bring extra challenges for those who are more experienced.
This highlypopular colony-simheavily revolves around building up a base and defending it from constant enemy raids and neighboring factions. AlthoughRimWorldalso focuses on building and managing the colony itself, some of the game’s greatest threats are its various raids.
RimWorldfeatures a small array of defenses that can be unlocked through research, but the success of a player’s defense often comes down to how well they have planned and constructed their base, as well as careful micromanagement and equipment allocation of colonists.
