RP Infinite ("RPI") is a text-based roleplay engine hosted on BYOND & created by Konlet & Arcetis. Created out of spite, the text-based game was made in retaliation to numerous bans that Arcetis had received on RP Unlimited ("RPU"). It ended up replacing RPU after it could not go on anymore. It's one of the relatively popular, yet unknown text-based games on BYOND. There's always a new server being made every other day, keeping the player base thriving.
It is one of two off-springs of RPU. RPI & RPU share an almost similar engine, with the exception of a few codes. RPU did try to make a comeback as RP Unlimited Revived, but by this time, majority of its player base migrated.