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

Antivirus PROTOCOLDormant
Also computers, 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
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
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
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
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.
90% 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
Lazy Galaxy 2
Also 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
Time SurvivorComing soon
Also upgrade tree, combat
Survive in an arena as your life energy drains, grabbing orbs and fighting enemies, then spend resources in a four-branch skill tree after each death.
3.8★ galaxy25% idle
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.
73% steam
Bones and Coins
Also upgrade tree, combat
Build a hero party that auto-fights skeletons in catacomb rooms, then spend loot on a skill tree, blacksmith weapons with unique attack styles, and guild upgrades.
73% steam
Kin and ConquestUpdated
Also combat, upgrade tree
Guide a fox with your cursor through a monster-filled mountain, mining rocks and gathering loot to upgrade gear, a skill tree and permanent blessings.
74% steam3.8★ galaxyhas ending
absorber
Also combat, upgrade tree
An idle RPG where you take the abilities of beaten enemies, build through skill trees, and prestige to grow stronger.
4.4★ galaxy
Whack-A-Monster DemoUpdated
Also combat, upgrade tree
Swing a hammer at monsters for loot, buy skill tree upgrades and new gear, and beat a boss at the end of each level.
3.9★ galaxy
Cheese, Please!Updated
Also combat, upgrade tree
Steer a mouse pilot's auto-firing ship through bullet-hell runs against a cat empire, growing a skill tree and collecting cat pilots.
3.9★ galaxy
Beyond The Blight
Also combat, upgrade tree
A first-person 2.5D dungeon crawler: loot, pick skills from a large tree and survive poison air to hunt the source of a blight.
3.9★ galaxy
Startup Panic
Also upgrade tree, computers
Go from bedroom coder to tech CEO by choosing weekly projects, hiring staff, growing a skill tree and fighting rival companies across a world map.
54% steam
Clicker Heroes 2
Also upgrade tree, combat
Click through endless zones and worlds, chain skills for DPS, and program an automator to play for you. It never ends.
53% steam50% idle
NodebusterComplete
Also upgrade tree
Sweep your cursor over nodes, spend the bits on a huge upgrade web, go again. A tight, active, few-hour hit.
97% steam3–6h ending10% idle
Digseum
Also upgrade tree
Dig up relics across a dozen sites and display them in your museum to fund better tools. A compact run of a few hours.
98% steam
Berry Bury Berry
Also upgrade tree
Grow berries in a first-person garden and drop them into a strange hole for cash, upgrading helpers while an unsettling mystery with several endings unfolds.
98% steamhas ending
(the) Gnorp Apologue
Also upgrade tree
Strike a rock for shards and hire a growing crew of gnorps to smash and haul them, stacking synergies until the numbers explode.
96% steam
Unnamed Space Idle
Also 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 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