Games like FortDef

Islet Online is a 2D sandbox MMORPG that offers players a pixelated, nostalgic experience. Gather resources, craft items, and build your own island while interacting with other players in a vast, persistent world. Battle monsters, complete quests, and customize your character to create a unique gaming experience.

"Vortex: The Gateway" is an open-world survival horror game set on an alien planet, where you must explore, adapt, and fight to survive. In story mode, you'll uncover the changing state of Earth while dealing with dangerous local species, while survival mode tasks you with keeping your injured friend Mike alive. Gather resources, build shelter, and fend off alien attacks to ensure your survival.

"Dig or Die" is a strategy-based game with physics-centered building mechanics and a water cycle that affects gameplay. As a CRAFT & Co. representative, you must sell automated fabrication tools and use them, along with local resources, to build defenses and escape a hostile planet. The game features classic solo and multiplayer co-op modes, as well as custom game modes.

In RuneScape: Dragonwilds, players explore the vibrant continent of Ashenfall, uncovering ancient ruins and mastering wild, transformative magic. Prepare potions, craft gear, and level up to confront the looming threat of powerful dragons. Your journey is a battle for survival and dominance against the Dragon Queen herself.

QANGA is a role-playing space sandbox featuring seamless exploration of an entire solar system with no loading screens. It offers single-player, co-op, and PvP modes with ingenious mechanics and delightful visuals, though it involves significant grinding and contains numerous bugs. Play solo or with friends in this evolving early access universe.

"CardLife is a massively multiplayer role-playing game set in a unique, hand-drawn cardboard world. Craft your own weapons, tools, and characters, and embark on adventures alone or with others. Explore community creations, defeat powerful creatures, and level up as you journey to the center of the island."

Survive, exploring a vast island where everything is interactive and covered with zombies. - Build and upgrade bases using materials obtained by cutting down trees, mining up stones and collecting artifacts. - Get food through hunting and farming, cook and eat. - Build fortresses and traps to guide zombie movements to defend the flocking zombie waves. - Collect various items, weapons and costumes …

"Tile Miner" is a 2D mining and exploration game where players dig through layers of earth to discover valuable resources. Use these resources to build and upgrade your mining operations, and craft new items to aid in your excavation. The game features procedurally generated worlds, allowing for a unique experience each time you play.

In "Outpost Zero," players lead a team of robotic assistants to build, automate, and defend a base on the alien planet of Gaiya. The goal is to prepare for future human colonists seeking to escape Earth, all while competing with other corporations for profit and survival. Players must balance resource management, base defense, and combat against alien creatures and pirate raiders to succeed .

Lone Wolf: Horizon is an action-adventure game set in a post-apocalyptic world. As the last surviving member of the Lone Wolf faction, players must navigate through treacherous environments, battle rival factions, and make strategic decisions to ensure their survival. The game features a rich, immersive storyline, various weapons and skills to upgrade, and multiple choices that impact the outcome of the game.