Can You Upgrade Your Backpack In Space Engineers?
In Space Engineers, the game’s inventory system now lets you adjust your carry capacity upfront—just like how real astronauts train for weightless environments before heading to space.
Where Space Engineers Meets Real-World Space Tech
Every gram counts in space. Whether you're hauling cobalt from a moon’s dark soil or ferrying hydrogen between refineries, managing your backpack’s capacity isn’t just a gameplay mechanic—it’s a daily challenge. The developers have leaned into this realism, letting players adjust inventory limits upfront in World Settings. (Honestly, this is the best way to simulate how real astronauts train with weightless environments before launch.)
Key Mechanics of Inventory in Space Engineers
| Action | Method | Purpose |
|---|---|---|
| Increase inventory | World Settings → Inventory Size (per save) | Permanent boost to carry capacity |
| Delete a build | CTRL+X (default) | Removes structure; items go to clipboard |
| Split stacks | Right-click + drag to inventory field | Transfer partial stacks between inventories |
| Transfer all block items | Right-click container with block in toolbar | Auto-loads all required components |
| Use Build Planner | MMB-click full inventory in toolbar | Auto-withdraws blueprint components |
Cobalt, Hydrogen, and the Real Science Behind the Game
Cobalt Ore, like its real-world counterpart, is a strategic metal often found beneath planetary surfaces—in asteroid belts or moon regolith. In Space Engineers, it’s one of the rarest harvestable ores, second only to platinum and gold, which mirrors its scarcity on Earth. Meanwhile, hydrogen is the game’s lifeblood: it powers thrusters and life support, just as NASA and SpaceX envision hydrogen playing a key role in deep-space missions. But beware—overheated hydrogen tanks don’t just vent; they explode, a dramatic callback to real hydrogen safety concerns. A full hydrogen tank in the game lasts about 480 kilometers—close to the range of modern hydrogen fuel-cell vehicles like the Toyota Mirai.
Gravel isn’t just space debris. In the game, it’s the backbone of fusion reactors, much like how tritium and deuterium are critical in real fusion energy research. The more gravel you stockpile, the faster you can build power sources—just don’t let your reactor run dry mid-battle.
Cheats, Creativity, and the Edge of the Known
Even in a game about survival, players crave control. With the Cheat Menu, you can spawn entire planets or moons by diameter—no more waiting for procedural generation. Need a hydrogen generator? Build a conveyor system from ice drills to H2/O2 generators. Want to go full sci-fi? Spawn uranium with creative tools and build a reactor in orbit. But remember: in survival mode, cheating can backfire. Unowned blocks left behind might crash your server—or worse, your progress.
For those who love logistics, conveyor systems are the game’s circulatory system. They move ore, ingots, and components between drills, refineries, and assemblers—just like supply chains on the ISS or future lunar bases. A well-designed network can mean the difference between thriving and running out of oxygen mid-spacewalk.
Practical Tips for Players in 2026
- Start small: Increase inventory in World Settings before you leave the starting planet—don’t wait until you’re stranded on an asteroid.
- Use the Build Planner: It remembers blueprints and pulls exact component counts from your inventory. It’s like having a digital assistant in a spacesuit.
- Watch your hydrogen: Tanks leak when damaged and explode on destruction. Keep them behind bulkheads or in shielded compartments.
- Cobalt spots: Look for dark patches on asteroids or planetary surfaces—those are indicators of buried ore. Bring a drill and patience.
- Creative mode learners: Spawn a small ship with a welder, then test inventory limits. It’s the fastest way to understand real-space constraints.
What’s the best way to increase your inventory size?
Do this before you leave the starting planet. Waiting until you’re stranded on an asteroid just makes things harder. (Trust me, you don’t want to be stuck with a tiny backpack when you’re low on oxygen.)
Can you increase backpack size mid-game?
Once you’ve started your save, the inventory size stays locked. That’s why it’s smart to plan ahead. If you’re already deep into a survival game with a cramped inventory, you’ll need to find workarounds—like offloading items to storage containers or building dedicated cargo ships.
How does inventory size affect gameplay?
With a bigger backpack, you can haul more cobalt, hydrogen, or gravel in a single trip. That cuts down on travel time and makes long-distance mining runs far less tedious. In most cases, it turns a frustrating grind into a smoother experience.
What’s the default inventory size in Space Engineers?
These numbers can vary slightly depending on the game version, but they’re the standard starting points. If you’re playing on a multiplayer server, check the server settings—some admins tweak these values to keep things balanced.
Does increasing inventory size require mods?
That’s one of the game’s nicer quality-of-life improvements. No more hunting down sketchy mods or dealing with compatibility issues. Just open World Settings, adjust the slider, and you’re good to go.
How do you manage inventory in survival mode?
Start by offloading excess items into storage containers near your base. Use conveyor systems to automate resource movement between drills, refineries, and assemblers. The Build Planner is a lifesaver—it remembers blueprints and pulls exactly what you need from your inventory, so you’re not constantly shuffling items around.
What happens if you run out of inventory space mid-mission?
Running out of space mid-mission is frustrating, but it’s not the end of the world. The key is to plan ahead. Always carry a few empty storage containers with you. When your backpack fills up, dump the excess into a container and keep moving. If you’re far from base, consider building a temporary storage depot on the spot.
Can you transfer inventory between ships?
Connectors are the easiest way to do this. Link two ships with a connector block, then open their inventories side by side. Drag and drop items between them. If you’re in a hurry, you can also use connectors to automate the transfer—just set up a conveyor system between the two ships.
How do you split stacks in inventory?
This lets you divide a stack of items into smaller batches. It’s useful when you need to leave some resources behind or transfer partial stacks to another container. Just be careful not to drop items mid-transfer—that’s an easy way to lose valuable resources.
What’s the most efficient way to organize inventory?
That way, you’re not constantly digging through a disorganized mess to find what you need. Use the toolbar slots for frequently used items, and keep a dedicated slot for emergency supplies like medkits or oxygen. (Honestly, this is the best way to avoid the classic “I need this one bolt but it’s buried under 50 uranium ingots” panic.)
Does inventory size affect ship building?
Your backpack’s capacity has no bearing on how many components you can store in a ship’s inventory. That’s determined by the ship’s block limits. However, a larger backpack makes it easier to gather materials for construction without constantly running back to base.
How do you increase inventory size for large grids?
This works the same way as the small grid setting—just open World Settings and slide the Large Grid Inventory Size bar to your desired capacity. Keep in mind that larger inventories mean more weight, which can affect your ship’s performance. Balance is key.
Can you increase inventory size in creative mode?
Creative mode lets you experiment freely, so go ahead and max out your inventory if you want. It’s a great way to test how different inventory sizes feel before committing to a survival playthrough. Just remember—realism goes out the window in creative mode.
