🏗️ Base Building – Season 1 Overview

Welcome to the base building guide for Season 1 – The Crimson Plague in Last War: Survival. This section covers everything related to season-exclusive buildings, including upgrade priorities, weekly checklists, and profession-based recommendations.

❗ This section excludes standard base buildings (HQ, Barracks, etc.) and focuses purely on Crimson Plague mechanics.

🧬 Season 1 Exclusive Buildings

🧪 Virus Research Institute (VRI)

Boosts Virus Resistance — essential to survive against infected and PvP effects.
Max level: 30 (no HQ limit).
Requires Immune Protein to upgrade.
✅ Top priority for all players in Week 1–2.

🌱 Protein Farms

Produce Immune Protein, required to upgrade all other seasonal buildings.
You can build up to 4 farms.
Unlock sequentially as you level earlier ones (Lv5 → Lv10 → Lv10).
Upgrade evenly to maximize production.

🛡️ Troop Specialty Bases

Unlock in Week 3.
Buff a chosen troop type (Tank, Missile, or Aircraft) with +1% ATK/DEF/HP per level.
Max level: 30, no HQ restriction.
Requires Mutant Crystals + Immune Protein.

🛰️ Military Base (Outpost)

Unlock in Week 4.
Lets you capture cities across warzones.
Built using Immune Protein and deployed on the world map.
Can be destroyed but still capture cities if the timer finishes.

📅 Weekly Progression

Season 1 building is broken down into weekly priorities, with guides for F2P, light spenders, and whales — including differences between Engineer and War Leader professions when relevant.

✅ Efficient Immune Protein use
✅ Proper building unlock orders
✅ Stockpiling strategies for each player type