Terraria 1.4.5: Bigger & Boulder - Complete Guide

What's New in Terraria 1.4.5?

The Bigger & Boulder update represents one of the most ambitious content drops in recent Terraria history. While it started as a Dead Cells collaboration, the scope expanded dramatically to include features that have been requested by the community for years.

Dead Cells Crossover Content

The collaboration with Motion Twin's roguelike masterpiece Dead Cells brings an exciting array of themed weapons, armor, and tools to Terraria. Players can now wield iconic Dead Cells weapons and equip signature armor sets that capture the spirit of both games. The crossover includes unique items that blend seamlessly into Terraria's existing progression system, offering fresh gameplay options for veterans and newcomers alike.

Palworld Collaboration

In an unexpected twist, Terraria 1.4.5 also features a Palworld crossover. This collaboration introduces Pal-themed summons that summoner class players can deploy in their adventures. While details on all the Palworld content are still being discovered by the community, these new summons add another layer of variety to the summoner's arsenal.

New Skyblock Seed

One of the most exciting additions is the official Skyblock world seed. Players start on a tiny floating island with virtually no resources. The challenge? Survive and thrive using only what slimes drop and your ingenuity. Slimes become your lifeline, dropping essential items like dirt, acorns, seeds, bombs, and cloud blocks. This brutal survival mode forces players to completely rethink Terraria's traditional progression and has already sparked countless creative playthroughs across the community.

Summoner Class Overhaul: Nine New Whips

The summoner class receives significant attention in this update with nine brand-new whips spanning from Pre-Hardmode to endgame content. However, there's a major change that has divided the community: whip stacking has been removed. Previously, players could stack effects from multiple whips by quickly switching between them during combat, dramatically increasing damage output. In version 1.4.5, hitting an enemy with a whip now clears the effect of any other active whip.

While some players miss the high-skill ceiling that whip stacking provided, others appreciate the simplified approach. The new whips themselves are powerful, with unique effects ranging from spawning mini-spiders to summoning meteors on tagged enemies. Combined with new whip reforges and stronger individual effects, summoners remain a viable and engaging class despite the mechanical change.

All New Items and Summons

The update introduces hundreds of new items across multiple categories. Here's a breakdown of the major additions:

• New Weapons and Tools: Nine new whips for summoners (including the Slime Whip, Cobweb Whip, and endgame Moon Lord whips), Dead Cells crossover weapons, Super Bomb and Freeze Bomb, Mud Ball projectile, Flymeal sword (required for an achievement), various Palworld-themed summons
• Building and Decoration: Sharp Spike blocks, Cloud Platforms, Toybreaker Brick, Shimmerfall Blocks and Walls, Decorative Cobwebs and Demon/Crimson Altars, Magic Shimmer Dropper, Mitey Titey (tool for placing decorative stalagmites), Portable Kiln (for placing decorative pots)
• Vanity Items: Bikini, Swimsuit, and Swimtrunks, Lilac Dusk Vanity set, Hallowed Crown, Welding Mask, Pink Phaseblade and Phasesaber, Moon Lord costume set, new developer armor sets (Chicken Bones and Kazzymodus)
• Quality of Life: Shell Phone (final Cell Phone upgrade), Rainbow Glowsticks, Chlorophyte Visor

Secret Seeds and World Generation

Terraria 1.4.5 revolutionizes world generation with a brand-new World Seed Menu. Instead of manually typing cryptic codes, players can now browse and select from various special seeds, and even combine multiple seeds for unique effects.

The New Seed System

The updated seed menu allows players to browse available special seeds visually, combine multiple seeds to create custom world experiences, enter new secret seeds discovered by the community, and preview seed effects before world creation.

Notable Secret Seeds

While the community is still discovering all the secret seeds, here are some confirmed additions:

• Skyblock - Start on a tiny island with extreme resource scarcity
• dualDungeons - Generate two separate dungeons in your world
• rainsForAYear (or variations like "bring a towel") - Persistent weather effects
• monochrome - Black and white visual filter
• rainbowroad - Colorful visual modifications

Classic secret seeds like "For the Worthy," "Not the Bees," and "Drunk World" (5162020) remain available and can now be combined with new seeds for unprecedented world variety.

Seed Combinations

One of the most exciting features is seed stacking. For example: Celebration + Drunk World combines party aesthetics with dual evil biomes; Skyblock + No Traps offers extreme survival without trap hazards; For the Worthy + Vampire delivers the ultimate challenge with sunlight mechanics. Experiment with different combinations to find your perfect world setup.

Boss Changes: What You Need to Know

While Terraria 1.4.5 doesn't introduce many brand-new bosses, several existing bosses have received adjustments and improvements. The most significant addition is Mechdusa, though technically this boss was introduced in the 1.4.4 update and carries over into 1.4.5.

Mechdusa: The Mechanical Monstrosity

Mechdusa is a combination boss exclusive to the "getfixedboi" (Everything) seed. This terrifying creation merges all three mechanical bosses into one entity: The Destroyer's serpentine body, Skeletron Prime's skull and arms, and The Twins as eye sockets.

To summon Mechdusa, players must craft Ocram's Razor by combining all three mechanical boss summoning items at a Mythril or Orichalcum Anvil. This can only be done in a getfixedboi world. Defeating Mechdusa grants loot from all three mechanical bosses simultaneously, making it an efficient albeit challenging path through Hardmode progression.

General Boss Adjustments

Most bosses have received minor balance tweaks and quality-of-life improvements. Music tracks for several bosses have been updated, and AI patterns have been refined for a more polished experience. However, apart from Mechdusa, no completely new bosses were added in this update.

All New Achievements

Terraria 1.4.5 introduces 22 new achievements, bringing the total to 137. Here are all the new achievements you can unlock:

1. Book Worm - Complete the Bestiary (catalogue every creature)
2. Boulder Lord - Defeat Moon Lord in a getfixedboi world
3. Queen Machine - Defeat Mechdusa (combined mechanical bosses)
4. Fortune Favors the Bould - Discover a friendly Star Boulder
5. Rollin' In Your Grave - Take a ride in your tombstone
6. Fear The Sun - Wear vampire garb and get a sunburn
7. It's Shaling Outside - Survive a boulder rain event
8. Extra Life - Die as a hardcore character and survive (respawn mechanics)
9. Grave Mistake - Kill an NPC or friend with your tombstone
10. Spicy Licks - Play a six-stringed instrument
11. Mini-Me - Equip the complete Moon Lord costume set
12. Good To Know - Get villagers combat ready (use both Advanced Combat Technique books)
13. Prepare to Dye - Scare villagers with the Flymeal sword
14. New Digs - Give a villager a new look (shimmer transformation)
15. My People Need Me - Die in space on a getfixedboi world
16. Going Oldschool - Toggle the original title screen (click sun/moon in menu)
17. Sea You Later - Craft the Shell Phone
18. Trash Compactor - Research 50% of items in Journey Mode
19. Conservationist - Plant 100 acorns
20. Interdimensional Recycling - Give the Dryad Joja Cola (unlocks Junimo pet)

Additional secret achievements still being discovered by the community

These achievements range from simple (clicking the menu) to extremely challenging (completing the entire Bestiary or defeating bosses in special seeds).

Patch Notes Highlights

Beyond the major content additions, Terraria 1.4.5 includes hundreds of smaller improvements. Here are the most impactful changes:

Crafting System Improvements

The crafting interface has been completely overhauled: searchable tabs organize items by category (Weapons, Furniture, Tools, etc.); chest integration allows crafting with materials stored in nearby chests; tool feedback displays remaining material counts on the hotbar; right-click safety prevents accidental pickup of crafting stations; prefix stacking allows identical items with different modifiers to stack together.

Combat Balance

• Whip stacking removed (only one whip effect active at a time)
• Whip damage penalties adjusted (heavier on early whips, lighter on late-game whips)
• Ranger armor helmets now apply damage bonuses to ammunition (reduced from 15% to 12% to compensate)
• Various weapon damage adjustments across all classes
• Multiple tooltip improvements for clarity

Quality of Life

• Improved NPC portrait sprites
• Better tooltip descriptions for items and mechanics
• Enhanced platform and bed interaction instructions
• Bubbles now explain their function in tooltips
• Personal storage items (Piggy Bank, etc.) now mention stored coins can be used in shops

Console and Mobile Enhancements

• Radial button support for controller users
• Improved touch controls for mobile platforms
• Performance optimizations across all platforms
• Better UI scaling for different screen sizes

Crossplay: Play With Friends Across All Platforms

One of the most anticipated features for Terraria 1.4.5 is full crossplay functionality. According to Re-Logic's announcements, complete crossplay between PC, Console, and Mobile will be available shortly after the 1.4.5 launch and its following hotfixes.

This means players on PlayStation, Xbox, Nintendo Switch, PC, iOS, and Android will finally be able to adventure together in the same worlds. For those wanting to learn more about Terraria's crossplay capabilities and how to set up multiplayer sessions across platforms, check out our comprehensive guide on Terraria crossplay.

Setting up cross-platform servers has never been easier. Whether you're hosting a casual world for friends or running a dedicated Terraria server for your community, the unified version across all platforms ensures everyone can join the fun without compatibility concerns.

Tips for Summoner Players

With the removal of whip stacking and the introduction of nine new whips, summoner gameplay has evolved significantly. Here are some tips to maximize your effectiveness:

Early Game (Pre-Hardmode)

• Start with the new Slime Whip or Cobweb Whip for early progression
• Focus on finding accessories that boost minion damage and count
• Build an arena optimized for minion AI rather than your own dodging

Hardmode Progression

• Each new whip has unique effects - experiment to find what works for your playstyle
• The meteor-summoning whips work exceptionally well against slower, tankier enemies
• Don't forget to reforge your whips for optimal stats

Endgame Strategy

• The Moon Lord whips grant critical strike chances to your minions
• Focus on maximizing minion count and damage rather than trying to juggle multiple whips
• Use whips primarily for targeting rather than as your main damage source

Getting Started with Skyblock

The Skyblock seed offers a completely different Terraria experience. Here's how to survive your first night:

1. Immediate priorities: Kill slimes for dirt, gel, and hopefully acorns
2. Build a platform: Use any blocks you find to expand your starting island
3. Farm slimes aggressively: They drop almost everything you need early on
4. Be patient: Resource generation is extremely slow - plan every action carefully
5. Use bombs wisely: Bombs from slime drops are precious for mining and terraforming

The Skyblock challenge is about adapting to scarcity and creative problem-solving. Don't be discouraged by early struggles - the community has already proven that full progression is possible!

Conclusion

Terraria 1.4.5 "Bigger & Boulder" delivers on its promise of substantial new content while refining the core experience that has captivated players for over a decade. Whether you're returning after years away or have never stopped playing, this update offers fresh challenges, exciting crossover content, and quality-of-life improvements that make Terraria better than ever.

The simultaneous launch across all platforms, combined with upcoming crossplay support, means the Terraria community is more unified than ever. Jump in, explore the new Skyblock seed, hunt for secret seed combinations, complete the expanded Bestiary, or simply enjoy the refined crafting system. With Terraria approaching its 15th anniversary in 2026, this update proves the game's enduring appeal and Re-Logic's commitment to supporting their masterpiece.

What will you discover first in the Bigger & Boulder update? The choice, as always, is yours.