Quick answer: A demo is optional but often a strong conversion and wishlist driver, if your game makes a good impression in a short slice. It also doubles as a real-world test build. The risk: a buggy or unrepresentative demo can hurt more than help.
A demo lets players try part of your game before buying. Whether you need one depends on whether a short slice sells your game and whether you can make that slice polished. For many games a demo is a powerful conversion tool, but a bad demo is worse than none, so it's a real decision.
A Good Demo Drives Conversion and Wishlists
For games that hook players quickly, a demo is one of the best conversion tools available, letting people experience the fun firsthand removes purchase doubt far better than any trailer. Demos also drive wishlists and benefit from events like Steam Next Fest, compounding their visibility.
If your game's appeal comes through in a short, self-contained slice, a demo lets that appeal sell the game. The decision leans yes when you're confident a taste will leave players wanting more.
A Demo Is Also a Real-World Test
There's a hidden benefit: a demo is a real-world test build. Thousands of players on varied hardware will surface crashes, performance issues, and rough edges before your paid launch, exactly the issues you most want to find early. A demo with crash reporting is a free, large-scale QA pass.
Bugnet captures crashes and reports from demo builds with full context, so your demo doubles as a stability test that hardens the game before launch. This makes a demo valuable even beyond its marketing role.
A Bad Demo Hurts More Than None
The risk is real: a demo that crashes, runs poorly, or misrepresents the game actively damages conversion, players assume the full game shares the problems and don't buy. An unpolished or badly-chosen demo slice can do more harm than having no demo at all.
This is why crash reporting on your demo matters, you want to fix what players hit before it costs you sales. With Bugnet surfacing demo issues by impact, you can polish the demo into an asset rather than a liability. So: make a demo if a strong short slice sells your game and you can make it polished, but not if it'll show your game at its worst.
Optional but often a strong conversion and wishlist driver, and a free real-world test build. But a buggy demo hurts more than none, so polish it first.