The enemy is the environment, not time
Games don't degrade just from sitting — they degrade from where they sit. Over months and years, humidity curls cards and warps boards, heat softens plastic and glue, sunlight fades art, and pests chew cardboard. Long-term storage is mostly about choosing the right space and sealing games against those threats. Get the environment right and a collection comes out of storage exactly as it went in; get it wrong and you can lose boxes to mold or components to warping without ever opening a lid.
Pick the right space
Climate is the single biggest factor in long-term storage. Hobbyists consistently rank moisture as the number-one enemy, so a stable, dry room beats a cheaper but damp or temperature-swinging space every time.
- Aim for cool, dry, and stable — a closet or interior room beats a garage, attic, or basement.
- Avoid humidity: it curls cards, swells boxes, and invites mildew over time.
- Avoid heat swings: attics and garages cycle hot and cold, warping boards and softening plastics.
- Keep games out of direct sunlight, which fades box art and card backs over the long term.
- Leave an air gap between shelving and any cold exterior wall, since trapped air against a cold surface encourages mold.
Use sealed totes, not cardboard
The most-repeated long-term mistake is storing cardboard game boxes inside cardboard moving boxes in an uncontrolled space — the outer cardboard wicks moisture and invites mold. Sealed plastic totes (Sterilite and similar rigid bins get named again and again) are far safer: they lock out humidity, pests, and water intrusion, and they don't collapse when stacked the way a damp cardboard box will. Drop a few silica gel or desiccant packets into every box and bin — it's cheap and the single most-recommended protection for a long hold. In a genuinely damp room, a small dehumidifier in the closet or wardrobe with the games earns its keep.
Keep games off the floor and lightly loaded
Store bins and shelves raised a few inches off the floor so a leak, flood, or burst pipe doesn't reach the boxes — a habit worth keeping in any basement or storage unit. Inside the bins, stand game boxes upright with organized components where you can, so each box holds its own shape rather than slowly crushing flat under a stack. Don't pile boxes deep enough that the bottom layer takes the weight of everything above it, and put the heaviest big-box games at the bottom.
Mind heat and sunlight, not just damp
Moisture gets the most attention, but heat and light do quiet damage too. Some hobbyists report plastic components sweating or degrading in extreme heat, so keep plastic-heavy games out of hot attics and un-cooled storage units, especially through summer. UV is the reason many people prefer closed cabinets or opaque bins for anything stored where sun reaches — direct light fades box art and card backs over months. A closed bin in a stable interior space sidesteps both problems at once.
Check in occasionally
Long-term doesn't mean forget about it. If games are stored anywhere with any risk of damp or temperature swings, look in every few months — check or replace the desiccant packets, make sure nothing has bowed, leaked, or attracted pests, and air things out if needed. A quick check catches a humidity or pest problem while it's still fixable, instead of discovering a ruined collection when you finally pull the games back out.