What kinds of NES games can I play on Play NES Online?

Play NES Online is a browser-based site that hosts NES (Famicom) games you can launch directly in your browser. Based on the site's own description and its game listings, the catalog covers four broad groups: first-party Nintendo classics (Mario, Zelda and similar), third-party and Japanese titles, modified or "hacked" ROMs, and a long tail of lesser-known games organized under tags like NES, ACTION, ADVENTURE, and OTHERS.

The main categories on the site

First-party Nintendo classics

The site's description names Mario and Zelda as examples of the Nintendo (NES) classic games it offers. These are the headline titles most visitors are looking for, and they sit alongside the rest of the Famicom-era first-party library.

Third-party and Japanese releases

The listings show this is not limited to Nintendo's own output. Examples visible on the page include:

• Castlevania – Curse of Suffering (a Castlevania series entry)
• Dragon Quest III – Soshite Densetsu e... (the Japanese title of a major RPG)
• Kawa no Nushi Tsuri (a Japanese fishing RPG)
• Kiwi Kraze (also known as The NewZealand Story)
• Juuryoku Soukou Metal Storm (Metal Storm)

The presence of Japanese titles like Dragon Quest III and Kawa no Nushi Tsuri means the catalog reaches beyond the English-language NES library into Famicom releases.

Modified and hacked ROMs

The site description explicitly states it includes "new hacked ROMs," and the listings back this up. Rockman 2 – God World (easy mode) is an example of a fan-modified version of a commercial game rather than the original release. If you want the unmodified game, check the title carefully — modified versions are mixed into the same catalog.

Games by tag

Games are grouped under tags rather than a single flat list. The tags visible on the page are:

Note that most listings carry both a genre tag and "NES" or "OTHERS," so a single game can appear under more than one label. The site also provides an A–Z index (0-9 through Z) for browsing by title.

What this means if you're deciding whether to use it

• If you want the famous first-party games (Mario, Zelda), the site says it carries them, but the visible listings lean heavily toward third-party, Japanese, and modified titles — so expect the catalog to be broader than it is deep on any one series.
• If you're interested in Japanese Famicom games, this is a strength: titles like Dragon Quest III and Kawa no Nushi Tsuri are listed.
• If you want original, unmodified versions, be careful. Hacked and modified ROMs (such as Rockman 2 – God World) are part of the catalog and are not always obvious from the title alone.
• If you prefer browsing by genre, use the ACTION, ADVENTURE, and OTHERS tags rather than scrolling the full list.

One practical note: the page shows vote counts next to games (for example, 53 or 60 votes), which suggests community activity around individual titles, but the listings themselves don't indicate which games are most complete or playable — you'll find that out by launching them.