Die Bahnwelt

The player directly moves one character in three dimensions in an overhead perspective through science fiction themed dungeons. The player can shoot in eight directions. There are also different second characters that the player can indirectly control through AI. There are multiple weapons that can be collected that can be switched at will. There is a lifebar that regenerates if no damage is taken for a period of time. The game has a save system. There is a partial fan translation into English available for this game. The game is currently freeware.

Source: Wikipedia, "Die Bahnwelt", available under the CC-BY-SA License.