Real-time multiplayer games utilizing Solana's ephemeral rollups enable gas-free interactions. @AnichessGame, @pip_world, @magicblock Games operating on the blockchain have long been constrained by speed limitations that differ from real-world real-time games. In particular, in multiplayer games where multiple users must move and react simultaneously, the latency between input and output significantly affects the gaming experience. Solana's base layer has a block generation time of about 400 milliseconds, which is suitable for economic settlements but presents structural limitations for real-time interactions that require multiple inputs per second. This gap becomes even more apparent when the consensus and gas fee model of the blockchain directly intersects with the game's interaction loop. Ephemeral rollups have emerged as an execution layer to address these issues. In this structure, the state required for the game is temporarily delegated from the main chain for a certain period and executed in a separate environment specialized for fast processing. Solana-based ephemeral rollups operate through procedures of state delegation, instant replication, high-speed execution, periodic commits, and delegation release. First, the account states related to the game are temporarily delegated to a specific rollup executor, and the state of the main chain is replicated only when actual access occurs. Subsequently, transactions are processed in milliseconds within a single sequencer environment, and traditional gas fees are not incurred during this process. The significance of this structure in real-time multiplayer games lies in the nature of interactions. Actions such as character movement, skill usage, and object manipulation require immediate responsiveness rather than the transfer of economic value. In ephemeral rollups, these actions are processed as gas-free transactions, allowing players to perform continuous actions without being conscious of costs. The execution costs are shifted to the application operator, who bears them on a session basis, reducing friction in interactions. The state at the end of execution is not immediately reflected on the main chain; instead, only summarized state changes return to Solana according to a set period. A crucial role in this process is played by the verification procedure through a security committee. If there are issues with the state changes submitted by the rollup executor, they are verified during a designated challenge period, and sanctions are imposed if fraud is confirmed. This mechanism functions as a device to balance fast execution and final settlement, minimizing delays during gameplay while ensuring integrity afterward. This structure also applies to game mechanics that include non-deterministic elements. For example, skills or events involving probability or randomness are processed through verifiable random number generation tools, and their results and proofs are recorded alongside the final state commit. This allows for natural presentation and responsiveness during gameplay while leaving evidence to verify the legitimacy of outcomes afterward. Ephemeral rollups also reveal their characteristics in another extreme use case. In high-density interaction environments where multiple agents act simultaneously, the volume of inputs that need to be processed per second increases sharply. Such situations place a significant load on a single sequencer-based high-speed execution environment, and the potential for abuse must also be considered in a gas-free structure. Currently documented structures do not clearly present standardized devices to distinguish between human players and automated agents or to limit action frequency. This highlights both the nature and limitations of the technology. Ultimately, real-time multiplayer games utilizing Solana's ephemeral rollups present new possibilities by separating interactions and settlements. During gameplay, they provide immediate responsiveness, free from the speed and cost constraints of traditional blockchains, while afterward ensuring consistency and economic finality through the main chain. This structure makes blockchain games feel closer to existing online games through gas-free interactions while simultaneously operating in a way that maintains the core properties of verification and recording inherent to blockchains. $SOL $CHECK $BLOCK $PIP