Anthropic Updates Claude Code to Block Video Game Clones

Anthropic has implemented a new constraint within the Claude Code system prompt to block the tool from recreating specific, existing video games. The update follows a trend where generative AI is increasingly utilized to produce decompilations, recompilations, and ports of classic titles, a practice that risks running afoul of intellectual property protections.

Refined System Instructions

Recent social media activity highlighted a shift in the system instructions for Claude Opus 5.5. The updated directive explicitly tells the model to focus on original titles, genre-based games, and projects derived from a user's own designs, rather than building exact copies of branded games. The Scale Report understands that these instructions are intended to prevent the tool from being leveraged as a mechanism for IP infringement.

Addy Osmani, a member of the team at Anthropic, confirmed the modification to the prompt on the Opus 5.5 model. In a public statement, Osmani explained that while the company wants to encourage legitimate game development, using their technology to bypass copyright or mimic existing software violates their core usage policies.

This move highlights the tension between the utility of coding agents and the legal realities of software development. By distinguishing between building from scratch and unauthorized porting, AI developers are attempting to avoid the scrutiny that often follows automated content generation in the gaming space. Osmani noted that the company is still iterating on these boundaries and remains open to user feedback if the filter becomes overly restrictive for original work.