Cal Ripken's Real Baseball
video game

Cal Ripken's Real Baseball, also known as Real Baseball Online or Ultimate Baseball Online, was the first free-to-play baseball based massively multiplayer online sports game (MMOSG). Operating from 2003 until 2008, the game was developed and published by American company Netamin Communication Corporation. The game was designed to allow 18 human-controlled players to compete simultaneously in virtual game, though the number was later reduced due to lag issues. Former Major League Baseball player Darrell Evans served as the game's spokesperson/ambassador prior to Cal Ripken's endorsement of the game. After it ceased operation in 2008, a fan-led open source project was attempted before Real Baseball's successor, Big League Online, was released for beta testing in early 2011.
Development and history
Netamin Communication Corporation was the developer behind Real Baseball Online, with the company having been founded in 1999. Netamin became the world's first company to develop the technology to build a Massively Multiplayer Online Sports Game (MMSOG), led by its founder and CEO (Chief Entertainment Officer), Andy Wang. The game entered live Beta testing in April 2004 and late in its development was associated with Disney/ESPN. Former Major League Baseball player Darrell Evans served as the game's "Ambassador" for the majority of its history until shortly after the ESPN deal was signed. After the release of Ultimate Baseball Online 2006 (known simply as UBO), the game had officially ended its Beta phase. Netamin announced a monthly subscription fee for UBO in September 2006, consisting of a $7.95 monthly fee for early adopters and a $9.95 monthly charge for new players.
The public source identifies “Cal Ripken's Real Baseball” as video game. This brief keeps that definition visible, then builds a research path around Ripken's, Real and Baseball.
Why this record matters
A short description can identify a subject without explaining its stakes. For “Cal Ripken's Real Baseball”, the useful work is to connect “video game” to the records capable of establishing context and consequence.
The citation trail is more important than the brevity of the summary: it shows where individual claims can be examined in context. The source revision retrieved here is dated Mar 6, 2026. The linked authority identifier is Q5018206. None of the 0 selected statements returned an explicit reference. The first chronological checks are 2003, 2008, 2011 and 1999.
A concise general-reference account can conceal disagreements about scope, terminology or the weight assigned to individual sources. The lead is largely declarative, so disagreement and counter-evidence require a deliberate search beyond the opening account. Authority statements aid reconciliation but still require their own references, qualifiers and ranks to be checked.
How to read it
Use the entry as an orientation point, then follow its citations and revision history. Names, dates and institutional relationships should be checked against the original record.
- Subject orientation
- Search vocabulary
- Locating named sources
The closest primary source, responsible institution and strongest cited specialist reference.
Three-step research path
- Establish the record: confirm the title “Cal Ripken's Real Baseball”, its source revision and the description used here.
- Expand the search: follow Cal Ripken's Real Baseball primary sources, Cal Ripken's Real Baseball archive and Ripken's research across catalogues and specialist indexes.
- Test the account: compare the strongest cited source with the responsible institution’s current record and note any disagreement.
Questions for further research
- Which source most directly establishes the central claim about “Cal Ripken's Real Baseball”?
- What terminology or title could unlock a more precise catalogue search?
- Which institution is responsible for the underlying evidence?
Search terms from this dossier
This entry incorporates text from “Cal Ripken's Real Baseball” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.