John Romero Explains How id Software Used Doom Shareware to Win Distribution

In a story that reframes Doom’s early success as a deliberate business strategy rather than pure marketing luck, id Software co-founder John Romero has described how the team leaned into free shareware and even sidestepped copy protection to maximize the game’s reach—accepting that some sellers would profit off it anyway.

How Doom’s shareware model drove distribution

When Doom launched in 1993 and began spreading rapidly across PC drives, Romero said the turnaround wasn’t the result of “tighter” promotion or a pre-planned sales push. Instead, id Software relied on the shareware approach: the first episode, containing nine levels, was available to play and share for free. Players who liked what they experienced could then buy the full version, which bundled the remaining two episodes.

Romero’s key point was that the studio cared more about getting the game into as many hands as possible than about squeezing out the highest possible profit from every unit sold. The strategy, in his telling, supported the next step: making enough money to keep development moving forward.

Dealers reportedly sold copied shareware anyway

1. Some retailers copied the freely available shareware onto their own discs and sold them, even though the then-current license required a written agreement with id Software.
2. Romero said that in certain stores, customers could find up to ten different boxes—even when those boxes contained the same shareware build.
3. Despite this, id Software did not treat the behavior as a major problem.

In Romero’s account, the studio’s priority remained distribution first, monetization second—enough revenue to fund the next game rather than attempting to fully control every copy in the supply chain.

Skipping copy protection and “legitimizing” local distribution in Taiwan

Romero also described id Software’s stance on copy protection. The studio, he said, chose not to add it because anyone determined to copy the game would find a way regardless.

As part of that pragmatic approach, id Software reportedly went further in Taiwan, where Romero claimed software copying was a standard part of the local market. The company then approached some of the region’s biggest software pirates and offered them boxed copies at very low prices. Romero said these contacts then took large quantities.

He did not specify whether the boxes actually contained the game media or functioned as a physical stand-in for distribution, but the intent behind selling official boxes was to legitimize the local distribution channels.

Romero’s takeaway

Overall, Romero’s comments frame Doom’s early growth as a strategy built around reach: free shareware, a refusal to rely on copy protection, and a willingness to tolerate imperfect licensing realities—so long as the end result was enough commercial momentum to support the next project.

• Free shareware and a lack of copy protection helped Doom spread worldwide.
• The described business strategy emphasized distribution and long-term viability over maximizing short-term revenue.
• Romero’s comments tie the approach to delivering a strong game and ensuring funding for future development.