THE MOD CASE LIBRARY

See what others built.

Browse real upstream field notes by game and mod type. Each case explains the change, recorded environment, build route and lessons you can use.

Four source-documented cases. No ModLab in-game reproduction yet. Upstream authors report their results; versions and limits remain visible on every case. Difficulty is our editorial estimate, not a success rate.

GameMod type

4 of 4 source-documented cases

TerrariaAdvanced

Fal Arsenal: weapons, enemies and a boss

A tModLoader content pack with five weapons, three enemies and a two-phase boss. Learn how code, sprites and repeatable game tests fit together.

New content

Upstream-reported · ModLab test pending

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Age of Empires II DEAdvanced

San Franciscans: a custom civilization

An upstream civilization example combines bonuses, technologies, a wonder and units rendered from 3D into game sprites.

New content

Upstream-reported · ModLab test pending

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Minecraft JavaAdvanced

Voidlands: a dimension, ore and teleport key

A NeoForge example adds floating islands, a rare ore, a new tool tier and a reusable item for travelling between dimensions.

Worlds & progression

Upstream-reported · ModLab test pending

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ValheimIntermediate

Frostner reworked into a returning hammer

A managed plugin changes the existing Frostner weapon into a throwable thunder hammer that can return to the player’s hand.

Item mechanics

Upstream-reported · ModLab test pending

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New to modding? Start with one Terraria item before attempting a full content pack. Or explore the game-specific tutorials.