DnD 5e for two players
5e is in a decent number of the "looking for players" threads. Is there a specific kind of story you are looking for? Brothers testing their bond when death is on the line, or delving dungeons with someone you can trust completely? The two are very different stories, regardless of the adventure elements. Or even something that skews closer to reality, that one brother has been a mercenary for years, but some catalyst has pushed the other brother to the same life, and the older must safeguard the younger while he learns the ropes.