Arx Libertatis is a cross-platform, open source port of Arx Fatalis, a 2002 first-person role-playing game developed by Arkane Studios. Arx Fatalis features crafting, melee and ranged combat, and a unique casting system where the player draws runes in real time to effect the desired spell. The Arx Libertatis source code is based on the publicly released Arx Fatalis sources. This does however not include the game data, so you need to obtain a copy of the original Arx Fatalis or its demo.
Knights is an action game for two players involving two knights who must explore randomly generated dungeons and complete various quests. Each game revolves around a quest. A typical quest would involve finding some items and carrying them back to your starting point. This may sound easy, but as there are only enough items in the dungeon for one player to win, you may end up having to kill your opponent to get his stuff! Other quests involve escaping from the dungeon, fighting a duel to the death against the enemy knight, or destroying an ancient Book using a special Wand. While exploring the dungeon, you will find aid in the form of weapons, potions, and magical spells, but beware, for there are also deadly traps, bloodthirsty vampire bats, and zombies who exist only to kill living knights! This is a remake of an Amiga game by Kalle Marjola from 1994. This version has generally smoother gameplay than the original, and has full support for online play.