The gameplay in Left 4 Dead 2 PSP is identical to its bigger brothers. You play as one of four survivors, working together with up to three friends (or AI-controlled bots) to navigate through hordes of undead and make it to the extraction point. The controls are well-suited for the PSP, with intuitive button mapping and responsive gameplay.

Overall, Left 4 Dead 2 on PSP is an excellent option for fans of the series or those seeking a fun, free cooperative shooter experience on-the-go. While minor compromises were made for the PSP hardware, the gameplay and overall experience remain intact.

The graphics, while not as polished as their PC and console counterparts, still hold up surprisingly well on the PSP. The environments are detailed, and the character models are recognizable. The sound design, including the voice acting and soundtrack, is top-notch and adds to the overall tension and fear factor.