Endless TD

Endless TD is an online co-op tower defense game for solo play or teams of up to four. You build combinations of towers, collect gear during each run and defend against enemy waves that grow stronger over time. Gear resets when a run ends, so each match is a fresh attempt to assemble a powerful build.

Build and equip

Enemies and bosses can drop gear that changes your build as a run progresses. You can collect 10 complete armor sets, each with cumulative bonuses and a six-piece effect, along with 40+ Relics covering effects such as elemental damage, critical strikes, economy, sustain, tower health and merging. There are also 31 Transformation Relics that turn utility talents into damage abilities, 14 named Fusion recipes that combine two Relic effects, and Mythic Shards for forging archetype-defining Mythics. Mythic Charge and Ascension have no fixed cap.

The drag-and-drop Inventory lets you complete armor-set rows, equip up to five complete sets at once, reroll unwanted items, sell gear for gold and fuse Relics. Armor pieces are helmets, chests, gloves, pants, boots and weapons. Completing a set row unlocks cumulative bonuses, capstone abilities and increased tower damage. Ten specializations offer different effects: Inferno spreads burns through enemy deaths; Frostweaver slows, freezes and shatters formations; Bloodstorm adds jumps to chain lightning; Plagueheart creates spreading poison clouds and overlapping venom fields; Radiant creates wide Holy Novas; Arcanist fires piercing projectiles and arcane shard storms; Stoneskin turns tower durability into offense; Marksman boosts critical strikes, executes weakened enemies and fires additional projectiles; Tactician turns tower health and timed power spikes into damage; and Necropath grows stronger through kills, deaths and boss takedowns.

Develop your build

You can use nine damage types: Physical, Fire, Ice, Lightning, Poison, Arcane, Unholy, Light and Water. Exploit enemy resistances, apply status effects, combine overlapping tower auras and build defenses for deep runs. Possible approaches include chain lightning across waves, poison clouds spread by enemy deaths, burns triggered by defeated bosses, critical strikes and execution damage, freezing and shattering formations, turning tower health into damage, Relic-heavy Ascendant builds, aura-focused support networks, rapid-fire projectiles and damage that scales with kills.

A build suited to one mode may struggle in another. Relics, armor, talents and Mythics can all change the direction of a run. You can also combine compatible towers into merged forms with new abilities, stronger stats and different battlefield roles. Merged towers inherit strengths from their parent towers and can progress through Star upgrades and Transcendence, while merge-focused talents, Relics, armor sets and Mythics add further synergies.

Choose an archetype

At the start of a game, choose one of six archetypes, each with its own passive bonus and signature Mythic. Archetypes influence your strategy without restricting you to one path:

• Marksman: precision strikes, critical hits and armor penetration.
• Elementalist: stronger elemental attacks and additional projectiles.
• Warlord: durable towers that turn health into damage.
• Tactician: larger and stronger support auras.
• Alchemist: faster and more powerful damage-over-time effects.
• Ascendant: stronger merged towers and amplified Relics.

Defeating tier bosses earns Mythic Shards. Gather enough to forge your archetype’s Mythic for a major boost and a playstyle-defining effect; additional shards charge it further, with no fixed limit on Mythic power.

Shape your talents

Earn Talent Points to develop more than 150 talents across interconnected paths. These cover Offensive, Controller and Support roles; Inferno, Frost, Storm and Plague branches; Arcane, Radiance and Unholy abilities; Tower Mastery; Fusion Mastery; and build-defining Keystones. Transformation Relics can change specific talents during a run, turning familiar utility paths into different damage builds. A searchable Talent Constellation helps you find nodes and plan combinations.

Game modes

Endless TD has seven PvE survival modes, each testing a different kind of defense:

• 1-Lane: defend one long route as enemy health, speed, resistances, bosses and environmental threats scale until your defenses break.
• Split: cover multiple routes, exits and pressure points, or build towers strong enough to control the whole battlefield.
• Chaos Rift: enemy resistances change each wave through mutation templates, so a strong strategy can falter as the run shifts.
• Elemental Surge: every 10 waves, damage types rotate between immune and super-effective states. Watch the upcoming cycle and avoid depending too heavily on one damage type.
• Juggernaut: face fewer, tougher enemies, with constant elite pressure, frequent bosses, enemy regeneration, rotating boss variants and resistance-altering auras. The mode tests concentrated damage and boss-killing power rather than clearing large waves.
• Vortex: survive a dense spiral where swarms race toward a central portal. Enemies get faster with each loop, making area damage, crowd control and economy management important against thousands of targets.
• Colosseum: enemies enter from every side and circle the arena without leaking. They remain while new waves spawn, and you lose when 300 enemies occupy the Colosseum at once.

Each mode rewards different strategies: a defense that succeeds in Vortex may struggle against Juggernaut’s bosses, while elemental builds may be challenged by Elemental Surge or Chaos Rift.

Battlefields and weather

Runs move through terrain themes including desert, jungle, lava, graveyard, toxic swamp and winter environments. The battlefield layout stays consistent for the duration of a run, while its environmental theme changes over longer runs.

Weather events can affect the battlefield, including rain, blizzards, sandstorms, toxic storms, volcanic ash, lightning and hail. Hazards include lightning strikes, tower-damaging hailstorms, scaling environmental threats, elemental damage events and environment bosses. Electric Storms disable every tower aura for an entire wave, including damage, speed, range, shield coverage, War Banners and Guardian Bastions. Shield barriers, tower durability and positioning can help you withstand hazards. Optional boss modifiers let bosses attack towers directly.

Multiplayer and Versus

Online co-op supports up to four players. Coordinate tower roles, combine elemental effects and cover multiple paths as each player develops a build through their own Relics, armor sets, talents and Mythic progression. Loot rolls separately for each player, so teammates do not compete for equipment. Multiplayer includes Steam invitations, joinable Steam Rich Presence, room codes, quick-play matchmaking and AI teammates.

You can also play competitive 1v1 or 2v2 Versus matches. Send enemies at your opponents while building your own defenses, balancing offense, economy and survival as both sides try to reduce the other team’s lives to zero. Separate rankings for 1v1 and 2v2 progress through competitive tiers and offer cosmetic rewards.

Seasons and progression

Named Seasons have their own statistics, rankings and leaderboards. They track highest wave and tier, damage dealt, enemies defeated, gold earned, games played, Versus rank and most-played archetype. At a season’s end, a permanent Season Trophy Card records your identity, cosmetics, statistics and best leaderboard placement. Seasonal progress resets for new competition, while Career Stats keep accumulating across games. Your profile also records lifetime accomplishments, best rankings, Versus performance, favorite archetypes, selected cosmetics and Season History.

Earn player icons, banners, profile frames, seasonal rewards and limited cosmetic bundles to customize your profile and lobby card. Your appearance is preserved on completed Season Trophy Cards.

Match settings

Lobby settings let you choose solo, co-op or Versus; relaxed survival or leaderboard-focused play; human players or AI teammates and opponents; and standard bosses or bosses that attack towers. You can select between Last Hit, Split and Everyone Gets Full gold distribution, and set game speed from 1× through 5×.