These genre is named after Rogue, a game developed by Michael Toy and Glenn Wichman in the early eighties. Roguelike games will have some or all of the following characteristics:
lightRPGs. The original Rogue had no character creation, later derivatives usually introduced a choice of race and class, but stat increases at level-up remain fixed. You control a single character only.
Most of the games have been situated in a Dungeons & Dragons-inspired world, sometimes with tongue-in-cheek anachronisms like the expensive camera in NetHack. The post-apocalyptic Alphaman is the only exception, still I do not see this as a rule. It is true for most RPGs.
Unfortunately, many of the old roguelike pages are meanwhile gone. Some have been archived on the Wayback Machine, but not always complete.
Other Notable Roguelikes,relevant as a general resource as well.
One of the most underrated Roguelike RPGs ever made, The UnReal World (UrW) is a captivating, but very difficult, role playing game set sometime in the Iron Age. What sets UrW apart from other Roguelikesand most other RPGs for that matteris the unique historical setting and realistic factors. The game is set in a very realistic gameworld, full of elements from Scandinavian mythology and folklore. Instead of standard AD&D character classes, you play as member of one of the ten Scandinavian cultures with authentic occupations, including a fisherman, a hermit, a trapper, or even a tradesman. The gameworld is huge and is randomly generated each time you play, thus ensuring virtually unlimited replayability.Home of the UnderdogsThe UnReal World is a Finnish project. It features a combination of rather simple graphics with photographs at 800×600 and runs on a 486.