Games like HELIX ARK
HELIX ARK. These games share the most with it, and each one says why.

Lazy Galaxy 2
Also space, combat, upgrade tree
Command a lazy alien race conquering galaxies through base building and fleet battles, turning combat experience into candy. Battles can be micromanaged or left to run.
80% steam50% idle
Galactic Idle
Also space, combat, civilization
Grow one planet into a space empire: research tech, raise fleets and conquer 20 worlds, with battles auto-resolved or fought squad by squad.

Unnamed Space Idle
Also space, combat
A ship, a sector map and a tidy prestige loop. Quietly one of Galaxy's most-played games.
92% steam4.5★ galaxy70% idle
Space Rock BreakerUpdated
Also space, upgrade tree
Blast asteroids with guns and lasers, then drop the ore through an upgradable Plinko board for credits to spend on a large skill tree.
96% steam
To The Core
Also space, upgrade tree
Fly between planets, drill for resources until fuel runs out, and buy upgrades so each dig reaches deeper than the last.
93% steam
Ancient Russian Life Simulator
Also combat, upgrade tree
A meme-heavy clicker where ancient warriors fight lizards, learn absurd techniques from a skill tree and sacrifice their foes for blessings.
95% steam
Far Mining
Also space, upgrade tree
Pilot a ship that auto-fires at nearby asteroids, then spend the haul on a large tech tree to escape deep space. A short run of about three hours.
95% steamhas ending
DEFRAG
Also combat, upgrade tree
Purge viruses from corrupted sectors, collect resources to strengthen and combine nodes, and try harder difficulties.
93% steam
Dice People
Also upgrade tree, combat
Roll dice that turn into fighting units, beat enemies for money and XP, and spend it in a large skill tree on luck, damage and more dice.
94% steam
Vanguard Galaxy
Also space, combat
Fight, mine, salvage and trade across a procedural galaxy, played full screen or docked on your desktop with an autopilot that can run things.
90% steam50% idle
Journey to Incrementalia
Also upgrade tree, combat
A necromancer summons minions and casts spells to smash through 99 walls, exploring a big resettable skill tree on a short hands-on run.
89% steamhas ending25% idle
Universe Horizon
Also space, upgrade tree
Fly a small ship outward from Earth, collecting resources from each body you pass and upgrading speed past light, across 16+ upgrade tabs, skill trees, and challenges.
94% steam50% idle
Meow Squad: Incremental Fishing
Also upgrade tree, combat
Net fish across five seas with a cat crew in 30 second rounds, grow a talent tree, and take on arcade boss fights to unlock deeper waters.
88% steam
Antivirus PROTOCOLDormant
Also upgrade tree, combat
Destroy viruses to collect code fragments, spend them in an upgrade tree for new weapons and powers, and beat each level's boss to advance.
87% steam
Microcivilization
Also civilization, upgrade tree
A pixel clicker strategy where you grow a nation, research tech, weather crises that can't finish you, and equip heroes as items.
84% steam50% idle
Galactic Mining Corp
Also space, upgrade tree
Drill alien planets for loot, then grow an HQ with a quirky crew, new drill parts and a large perk tree. A roguelite sequel to Geo.
84% steam
SPACE / MECH / PILOT
Also space, combat
Pilot a mech through space, defeating foes for XP and bigger numbers in a tongue-in-cheek idle RPG clicker.
85% steam
Wild Growth
Also upgrade tree, combat
Click to cast heals on your Norse warband in battle, then recruit allies, test formations and explore an upgrade tree after each loss.
84% steam25% idle
IGNOBLE
Also combat, upgrade tree
Timed runs where you slaughter enemies for blood and bones, then spend the haul on a growing skill tree and a deck of ability cards.
83% steam
Transport Defender
Also combat, space
Guard a cargo ship from boarding waves with a turret and auto weapons, scripting auto upgrades and auto ascension for long idle runs.
80% steam70% idle
Lazy Galaxy
Also space, combat
Lead a lazy alien race: grow your base idly and either take direct control in RTS battles or let the ships fight alone. Achievements unlock permanent research.
80% steam50% idle
SporbsUpdated
Also space, upgrade tree
Hover over alien organisms to harvest them without clicking, feed a fuel factory, and work through a 170-node skill tree toward a ride home.
77% steam4.1★ galaxyhas ending
Astro Prospector Prologue
Also space, combat
A bullet-heaven incremental where you mine coffee asteroids, fight SpaceCorp and upgrade your ship. This build is an early prologue.
4.6★ galaxy
Zad ArcheryUpdated
Also combat, upgrade tree
An archer clears waves of target monsters for loot, then grows through a big skill tree, five jobs, bow crafting and a mining system that reshapes skills.
74% steam