Here’s a fully explained Last Z Server Progression Timeline Guide, I’ve organized it week by week so it’s easier to follow and plan your account growth, especially if you’re free-to-play or just getting started.

This timeline is built from in-game observations and player experience. It might slightly shift between servers or based on special events, but it gives a strong roadmap for long-term planning.

Weeks 1–5: Non-Season Heroes (Starter Phase)

How It Works

• The game introduces non-season heroes during this phase.
• Typically, two heroes from the same faction drop together:
  • One via the Battle Pass
  • One via Beginner Events or Hero Back Packs

Expected Heroes

You’ll collect six non-season heroes during these five weeks.

• First 3 weeks: Main Hero unlocks (Battle Pass + Paid Packs)
• Next 2 weeks: “Hero Back Pass” system appears
  • You choose 1 of 3 heroes in each pack, spread across 2 sets.

Total: You should have all base non-season heroes by the end of Week 5.

Weeks 6–8: Season 1 Heroes

Introduction of S1 Heroes

• New hero batches start appearing weekly from three core factions.
• Heroes are released gradually in packs or events.
• Their skills start leaning toward training buffs, faction boosts, and specialized synergies.

Example:

• Olive’s third skill boosts training speed.
• S1 heroes generally support Blood Rose, Aster, etc.

Weeks 9–11: Exclusive Equipment for S1 Heroes

Gear Time

• Equipments tied to the heroes released in Weeks 6–8 become available.
• Expect exclusive equipment drops or purchase options tied to those heroes.
• This is where spending vs saving becomes important—F2P players need to pace themselves.

Note: These exclusives typically follow the same release order as the heroes.

Weeks 12–14: Selena Batch (New S1 Wave)

New Hero Set (Selena and Co.)

• Selena batch includes heroes that buff:
  • Assaulter Attack
  • Assaulter Defense
• Great synergy for those building DPS-heavy teams.

By this time, expect:

• Season 1 heroes to be spread across two main batches
• Hero Packs, Battle Passes, and Selective Passes for F2P/payers alike

Weeks 15–17: Selena Batch – Equipment Phase

• Equipment for the Selena batch drops here.
• Expect similar pack structures and unlocks as the earlier S1 phase.

Week 18 Summary: Season 1 Completion

Milestone

By Week 18, most servers will have:

• All S1 heroes unlocked
• All their exclusive equipment available
• Recruitment pool broadened to include all six base heroes

F2P Tip: Don’t panic if you only see Katrina or Sophia early on — more will rotate in!

Weeks 19–26: Season 2 Timeline

Structure

• 8-week cycle
  • Weeks 1–4: Hero releases (3 weeks for hero drops + 1 week for hero selective pass)
  • Weeks 5–8: Equipment phase

During this time:

• Expect season-specific reward boxes (fragment choice boxes)
• You’ll see tally periods and achievement milestones tied to Season 2 progression

Additional Progression Systems (Week 26+)

Steel Age & Research Tree (End of S2)

• Final week of Season 2 unlocks:
  • Steel Age feature
  • HQ Upgrade beyond Level 30
  • New Research Tree Paths:
    • Military Strategies
    • Siege to Siege
    • Army Building
    • Special Training branches

These are unlocked progressively by maxing out earlier trees like Hero Training, HQ Management, etc.

Chip System – Season 3 Sneak Peek

• Around Week 28, the Modified Vehicle menu gets a new “Chip” system.
• This system will play a key role in:
  • Boosting faction bonuses
  • Vehicle-based combat synergy
• It’s an early glimpse at what’s to come in Season 3 meta.

Recap Timeline (Cheat Sheet)

Stay patient: You don’t need to whale to get value. Planning your purchases and saving event resources goes a long way.

Pick your faction early: Sync your hero pulls with equipment and research priorities.

Don’t get discouraged if you fall behind a week or two—most rewards and systems loop back over time.

Prepare for S3 early: Focus your research and base growth so you’re ready to unlock the chip system.