A roleplaying game (RPG = Role Play Game) is a game in which players create roles that they act out, or "play", as part of the overall game. Numerous Star Trek RPG systems can be found including:

• Heritage Models
• FASA
• Last Unicorn
• Decipher
• Star Trek: 22nd Century D20 Role Playing Game

Forms of interactive fan fiction and the term "play-by-email" also apply as RPGs. Many fan-created RPGs are covered elsewhere in this wiki. See: Fan fiction.