Games like UFO Online: Invasion

"Will to Live Online" is a post-apocalyptic MMORPG where players must survive in a harsh, irradiated world filled with mutated creatures and hostile factions. Scavenge for resources, craft equipment, and build shelters to stay alive, while also forming alliances and engaging in tactical combat. The game features a dynamic open world with day/night cycles and weather systems, as well as a unique skill system that allows for character customization and specialization.

Tree of Savior is a Korean MMORPG game.

"Fallen Earth" is a post-apocalyptic MMORPG set in a ruined world, where you must survive as a clone with an unknown past. Explore the Grand Canyon's 1,000 square kilometers of harsh terrain, engage in classless advancement and non-linear gameplay. Participate in dynamic events, factional alliances, crafting, and PvP combat, with the freedom to play the character you want in a world of destruction and betrayal.

Stay Out, also known as Stalker Online, is a MMOTPS inspired by the S.T.A.L.K.E.R series of games and the novel "Roadside Picnic." Discover a world full of dangers and incredible events, which has its own laws and principles. Become one of the “Stalkers” - people living the romance of the unknown, able to overcome any trials in search of artifacts on the territory of the Alienation Zone. Take a …

Kritika: Reboot is a hyper-stylized, anime brawler game featuring over-the-top action with giant blades, superguns, and dazzling acrobatics. Fight with friends or rampage solo through hordes of enemies and super-sized bosses in an epic fantasy world.

"Stalcraft: X" is a Science Fiction Open World game that offers both single-player and massively multiplayer experiences. Set in the Chernobyl Exclusion Zone, it features a vast open world filled with mutants and anomalies. Players can choose to explore this dangerous universe alone or with up to two friends, promising unforgettable adventures.

"Aura Kingdom is a historically-inspired, anime-styled MMORPG with a massive open world and diverse customization options. Players can choose from ten classes, each with unique skills, and are joined by powerful Eidolons. Questing and combat against monsters with varying skills make up the majority of the game, with the option to play solo or in a party."

"Wakfu is a massively multiplayer, turn-based strategy game set in the World of Twelve. Engage in action-packed, tactical battles with 18 unique classes, and choose your path as a warrior, politician, merchant, or craftsman. With a humor-filled universe and a player-driven economy, Wakfu offers a limitless and dynamic adventure."

"Riders of Icarus" is a free-to-play MMORPG that allows players to capture and train mounts for combat and exploration in a vast fantasy world. The game features both PvE and PvP modes, with a heavy emphasis on aerial combat and epic boss battles. Players can choose from various classes, each with unique abilities and playstyles, as they uncover the mysteries of the world of Icarus.

Online survival horror at its darkest. As one of the few survivors of the outbreak, you must scratch a living out of the decaying ruins of society. Scavenge for supplies, trade with other players, and grow your sphere of influence. All the while, keeping your eyes peeled for the infected lurking around every corner.