Games like Katja's Abyss: Tactics

"Mech Armada is a single-player Warfare Turn Based Strategy game, offering around 17 hours of playtime with no two runs being the same. Command your own team of custom-built Mechs, upgrading from over 80 unique parts, in deep grid-based combat against The Swarm's bosses. Procedurally generated levels with varied post-apocalyptic environments create a challenging and engaging experience."

ReignMaker is a single-player historical role-playing game that combines match-3, tower defense, city building, and political strategy elements. Over 8 hours, players lead their kingdom against the Void Army, using match-3 and tower defense skills, as well as political decisions, to access more powerful spells, troops, and gear. With 50 towers, 20 spells, 10 troops, 12 implements of war, and millions of story possibilities, ReignMaker offers deep strategy and cultural customization.

Absolute Tactics: Daughters of Mercy is a vibrant, turn-based RPG adventure that puts a modern spin on classic tactics-style games. Featuring a diverse cast of characters, enormous boss monsters, and a dark world embroiled in war, Absolute Tactics plunges players right into the action as our hero Huxley and his dog Max build their team of allies to defend their home against a mysterious invading a…

Anomaly 2 is a real-time strategy game where players lead a military convoy through a post-apocalyptic world overrun by alien machines. The game features tower offense mechanics, allowing players to tactically plan their path and manage their units to complete objectives. A multiplayer mode is also included, where players can take control of the alien faction for strategic battles against human forces.

"MarZ: Tactical Base Defense" is a strategy game that challenges you to build a defense base and fight off zombie hordes on Mars. The game features a 20-mission story campaign, skirmish mode with customizable waves of enemies, and an intense "Outbreak" mode. Utilize powerful terraforming tools to create custom maps and share them via Steam Workshop, and research new upgrades for your towers. Recently updated with increased technology options and reworked balancing.

"Codex of Victory" is a strategy game where humans must defend against a race of transhuman cyborgs, the Augments, who seek to "liberate" humans from their organic bodies. The game features a single-player campaign with real-time base building, global strategic planning, and turn-based combat. Players must expand their underground bases and build a hi-tech army of drones, vehicles, and robots to stop the Augments' attack and save humanity.

Templar Battleforce is a turn-based strategy game set in a science fiction universe. As the commander of a group of Templars, elite soldiers with powerful suits of armor, you must defend human colonies from hostile aliens. Customize your Templars' abilities, weapons, and equipment, and use strategic positioning and special abilities to overcome your enemies in tactical combat.

"Anomaly Defenders" is a reverse tower defense game where players protect an alien tower from human invaders. Players strategically deploy and upgrade defensive units, utilizing special abilities and upgrades to fend off the human threat. With a focus on fast-paced, tactical gameplay, Anomaly Defenders offers a unique twist on the traditional tower defense genre.

"Halfway" is a single-player Science Fiction Turn Based Strategy game with an intriguing story and good gameplay. As the leader of a team of survivors, you must fight and outsmart the enemy aboard a colonized spaceship while uncovering the mysteries of the violent invasion. The game features tactical turn-based battles, unique characters, and an immersive storyline with outstanding visuals and fantastic music, though some grinding is required.

"Depth of Extinction" is a strategy RPG set in a flooded world. Assemble a team of mercenaries to protect what's left of humanity from underwater dangers. With turn-based combat, permadeath, and a retro-style pixel art aesthetic, it offers a challenging and immersive experience.