ModsJava
Base Invasion Siege Core Mod (26.2, 1.21.11) – Defend Your Base Against
Java mod listed for Minecraft 1.21. Downloads from the MC Java Mods app on Android.
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Base Invasion Siege Core Mod transforms your base into the target of monster raids and wave defense challenges. It adds a placeable core block that generates threat as you play, mine ores, and fight mobs. Once threat reaches the threshold, waves of hostile monsters march toward your base to break the core. You must build defensive structures, place traps, team up with friends, and survive every wave to earn tokens and upgrade your base.
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Features:
- Places a central defense block that tracks base progression, threat levels, and team data.
- Includes an in-game guide book with item icons to teach base mechanics and defense recipes.
- Grants tokens after successful defenses to purchase core upgrades and defensive structures.
- Shows upcoming enemy counts, boss alerts, and active event chances directly on the screen.
- Includes a smart path check that stops players from completely walling off the core.
- Allows monsters to walk in daylight without burning during active invasions.
- Lets players form teams with manager ranks to coordinate base defense together.
- Offers five base stages with increasing wave counts, scaling up to 15 waves in Stage 5.
Defense Blocks:
- Siege Barricade: slow down invading enemies and give defenders time to fight back.
- Spike Trap: damages any hostile monster that steps across its surface.
- Slow Trap: reduces the movement speed of incoming mobs to control chokepoints.
- Flame Trap: deals area fire damage to clusters of attacking enemies.
- Frost Totem: slows all nearby siege mobs within a set radius.
- Repair Pylon: helps restore core health during active monster invasions.
Invasion Events:
- Blood Moon: increases monster strength and raid pressure.
- Dark Fog: covers the battlefield in fog for more chaotic combat.
- Sky Attack: spawns flying monsters to pressure defenders from above.
- Siege Breaker: focuses heavy monster pressure directly on the core.
- Arrow Rain: creates ranged disruption across the battlefield.
- Elite Surge: raises the spawn rate of dangerous elite monsters.
- Boss Rush: launches a special wave packed with multiple bosses.
Infinity Mode:
- Allows progression beyond Stage 5 for endless wave challenges.
- Spawns stronger enemy variants with combined event modifiers.
- Pits your defenses against dangerous high-tier boss waves.
Commands:
/siege hud on: turns on the invasion heads-up display overlay./siege hud off: hides the invasion heads-up display overlay./siege team: shows information about your current defense team./siege team add <player>: invites a player to join your defense team./siege team remove <player>: kicks a member from your defense team./siege team promote <player>: promotes a teammate to team manager./siege team demote <player>: lowers the rank of a team manager./siege accept: accepts a pending defense team invitation.
How to Use:
- Craft and place a Siege Core block inside your base.
- Read the given guide book to check defense recipes and core mechanics.
- Surround the core with barricades and traps while leaving a clear path open.
- Right-click the core block to open the menu, track threat levels, and spend tokens on upgrades.
- Defend the core from all enemy waves when the threat meter fills up.
Screenshots:







Base Invasion Siege Core Mod Download Links
Quick facts
- Edition: Minecraft Java
- File type: .jar
- Minecraft version listed: 1.21.11
- How to install: Install the matching mod loader (Forge, Fabric or NeoForge) for your Minecraft version. → Download the .jar. → Put it in the .minecraft/mods folder and launch that loader profile.
- Where to get it: In MC Java Mods, or directly above on this page.
Install steps are the general flow for this file type — How to install Minecraft Java mods & modpacks walks through it step by step.
File checked by MCModsHub
- Downloads as 464986.mcaddon
- Download size: 434 KB
- Download link checked 23 Sept 2026 — working
- Mirrored on our own servers — the download does not depend on the original host
These come from our own check of the pack file, not from the source page.