Endless Frontier 2 Guide: Every System Explained, From Castle to Rebirth

This Endless Frontier 2 guide explains every system in ekkorr’s idle circle defense: the castle, the rebirth loop, units, relics, pets, race magic, and the modes that gate your progress. Each section gives you the working version of the system and the decisions that matter, then points to our deep guide where one exists. The game launched April 20, 2026 on Android and iOS, its meta has been tested and settled by the player community, and this page is the center of our EF2 coverage.

What Is Endless Frontier 2?

Endless Frontier 2 is a free-to-play idle RPG from developer ekkorr, released April 20, 2026 for Android and iOS. Your fortress sits in the middle of the map, enemy waves converge on it from every direction, and your units defend the circle while the economy runs with or without you. It is the sequel to the original Endless Frontier, and the biggest structural change is the battlefield: the original’s corridor rush became a hold-the-circle defense with the castle itself as a leveling character.

The sequel keeps the loop that carried the original for years: push waves, rebirth for medals, spend medals on permanent power, push deeper. Quests, dungeons, a challenge tower, and PvP ranking battles all return, and ekkorr patches weekly.

The Core Loop: Waves, Gold, Medals, Rebirth

A run works like this: clear each wave to advance, spend the gold on temporary levels for the run, and rebirth when progress stalls. Rebirth converts the run into medals, the permanent currency that levels your castle and heroes for every future run. The loop rewards speed over depth: a player finishing many fast runs out-earns one grinding a single deep run, which is why the community’s whole meta is built around game speed, wave skips, and medals per minute.

Two run types exist once you are established: speed runs for medal income, and push runs for a deeper wave record. They use different teams, different relic presets, and different spells. Our Endless Frontier 2 speed run guide covers both routines stage by stage, and the tier list ranks the units they run.

Quick Start Checklist

1. All medals on the castle until it stops dying instantly and you are pushing with skills.
2. Unlock three skill slots fast: run 2 heal and 1 lightning, then flip to 2 lightning and 1 heal once your tower stops taking real damage.
3. Max allied tower HP relics first, then econ relics in the community’s order: quest gold, quest open, quest upgrade, quest time.
4. Ascend one Skeleton Warrior to A3 as early as the shop allows, and refresh the unit shop every hour.
5. Keep at least one unit unevolved until you beat Spirit Highlands.
6. Redeem the three codes for 1,500 total rewards (details in the codes section below).

The Castle

ekkorr calls the sequel’s design “evolution to a stronghold,” and the phrase is accurate: the castle is your main character. It has level, attack, and defense upgrade tracks paid in medals, it does the tanking the original game asked units to do, and how long it survives decides how deep every run goes. Even endgame speed teams keep 90 percent of their medals on the castle.

Some units exist mainly to serve it. A family of unique passives adds castle levels per copy owned, and the community fields entire castle teams built from those units for pushes and gold leveling. Budget rule for new players: fortress first, one core unit second, everything else later.

Units and the Meta

The roster spans four races (Humans, Elves, Undead, and Orcs), and most units carry a unique passive that stacks for every copy you own: game speed, quest gold, castle levels, rebirth medals, wave skips. Those passives, not raw damage, decide the meta. Units also evolve into stronger II forms, and some passives change on evolution, so an evolve can help one team and hurt another.

The tested meta centers on Priest and Fairy as the speed core, Dark Archer as the rebirth wave team, and Skeleton Warrior as the budget star. Our Endless Frontier 2 tier list ranks every meta unit with its exact passive values and lays out the team builds for speed, push, castle, and rebirth work.

Races, Race Magic, and Quests

The four races counter each other in a fixed cycle, and Spirit Highlands and Tower stages are solved with it:

Each race deals more to the one it counters and takes more from the one that counters it, so a wall you cannot clear is often just the wrong race on the field.

Race magic adds an account-wide utility per race on top of the combat cycle:

• Human: automates quests.
• Elf: skips waves.
• Undead: cuts skill cooldowns.
• Orc: adds extra wave pulls.

Quests (Knight Order Cleanup, Mess Hall Support, Equipment Maintenance) run in the background as your gold engine, and unlocking more of them is a progression axis of its own: pet levels gate the later quests.

Relics

Relics are the equipment layer: each carries stats, sets grant bonuses per piece, and you build separate presets for speed runs, pushes, and medal farming. The community’s priority is strict and worth following from day one: max the allied tower HP relics first, then econ relics in the order quest gold, quest open, quest upgrade, quest time. Our Endless Frontier 2 relics guide explains the priority, the econ icon strings, and the tested 6-star presets stage by stage.

Pets

Pets buff combat and economy, and their fragments are a daily-limited resource, which makes farming order the real decision. The community’s tested priority: Tinkey and Icy first among the main pets, econ pets leveled evenly until they unlock Quest 27, then targeted pushes toward Quest 28. A five-star Moon also upgrades the rebirth medal team. Our Endless Frontier 2 pet tier list ranks all 41 pets and lays out the full daily routine.

Game Modes: Spirit Highlands, Tower, Dungeons, PvP

Four mode families sit alongside the main grind, and each asks for something different:

• Spirit Highlands: the permanent stage-puzzle mode where pet fragments come from. Our Spirit Highlands guide covers stages, stars, sweeping, and the evolution best practice.
• Tower of Challenges: 30 floors that reset on a cycle, paying diamonds and honor coins. Same solving toolkit as Spirit Highlands, but a separate mode with its own clock.
• Dungeons and boss hunts: where damage types matter and entry can be restricted to a single race, so every race needs a few leveled units on the bench.
• PvP ranking battles: knight order competition. The practical advice: your PvP team is a byproduct of your best units, not a separate project.

Codes and Free Rewards

Three codes work right now (Ekkorr, Endless Frontier 2, and Idle Defense), each paying 500 rewards through the settings menu, and we test them in-game. Our Endless Frontier 2 codes page tracks the working list, redemption steps, and expiries as they happen.

Coming from Endless Frontier 1

Progress does not transfer, but VIP status does: grab the XXXX-XXXX-XXXX-XXXX code from Endless Frontier 1’s settings and enter it in EF2’s VIP field for the status plus a currency bonus. Veterans will recognize most systems and should mostly unlearn one habit: units did the tanking in the original, the castle does it here. Our Endless Frontier complete guide and EF1 support tier list cover the original game.

All Endless Frontier 2 Guides

Every EF2 guide we publish lands in this index:

• Endless Frontier 2 Tier List: every meta unit ranked, plus the tested team builds for speed runs, pushes, castle work, and rebirth presets.
• Endless Frontier 2 Codes: all working codes, tested in-game, with redemption steps and expiry tracking.
• Endless Frontier 2 Pet Tier List: all 41 pets ranked, the Tinkey and Icy buyout rule, and the daily frag and ticket routine.
• Endless Frontier 2 Speed Run Guide: the run routine by stage, from the first Priest and Fairy teams to the late game Bomber core, plus push runs phase by phase.
• Endless Frontier 2 Relics Guide: the tower HP first priority, the econ four explained with the in-game icon strings, and the tested 6-star preset builds.
• Endless Frontier 2 Spirit Highlands Guide: how stages, stars, and sweeping work, the solving order, and the evolution best practice.

Gear for Long Idle Sessions

Idle games run for hours whether you watch them or not, so the gear that helps is a bigger screen, comfortable controls, and charging that keeps up. Prices checked August 2026.

Frequently Asked Questions

Summary

Endless Frontier 2 is a circle defense where the castle is the main character, speed beats depth, and the community has already mapped the meta. Start castle-first, follow the quick start list, and go deeper with the tier list and codes page. New guides land in the index above as they publish.