Lode Runner

The player controls a human, described as a "Galactic Commando" in the game's manual, who must collect all the gold in a level while avoiding the guards. After collecting all the gold, the player must reach the top of the screen to advance to the next level. There are 150 levels in total, which progressively challenge players' problem-solving abilities or reaction times.

Levels have a multi-story, brick platform motif, with ladders and suspended hand-to-hand bars that offer multiple ways to travel. Guards can pick up gold bars by running over them, but any individual guard cannot carry more than one bar at a time. The player can dig holes into floors to temporarily trap guards and may safely walk over them. If a guard is carrying a bar of gold when he falls into a hole, he will drop it and the player can then pick it up.

Around late 1980, high school student James Bratsanos heard from a friend about a new arcade video game, Space Panic by Universal, that involves climbing platforms and ladders while digging holes to trap monsters. Bratsanos was intrigued by his friend's description of the concept, and he wanted to develop it further. He began writing a Commodore PET program, called Suicide, using simple text-based graphics. Instead of developing enemy movement routines that were dependent on a specific shape of a game level, he developed an universal processing loop that would interpret a level, including the positions of the player and collectibles, and move the enemies according to the dynamically changing situation.

Bratsanos cited his lack of programming experience as a reason for choosing this approach. This novel design allowed to create a large number of different levels and apply the same game logic to them.

Lode Runner was very successful. It was Broderbund's second best-selling Commodore game as of late 1987, and sales had surpassed 300,000 copies by August 1984. It was the top-selling computer game in the United States during 1983. By 1985, the game had sold just as many copies in Japan. As of 1999, Hudson Soft's Famicom (NES) version had sold about 1.5 million cartridges in Japan and all versions of the game had sold over 3 million units worldwide, including more than 2 million sales in Japan alone.

Softline in 1983 praised Lode Runner, calling it "smooth, thoughtful, and quite addictive". The magazine approved of its large number of unique levels, level editor ("the possibilities are astounding"), and emphasis on "wits and strategy" over violence. Computer Gaming World praised Lode Runner's unusually easy-to-use level editor and the strategy necessary for an arcade title, describing it as "one of the few thinking men's arcade games". In August 1984, Computer Gaming World held a contest for the best reader-built level. Praises for the introduction of strategy into the "climbing game" genre and for the intuitive level editor were repeated in Video magazine's review of the game as well as praise for its graphics and animation, with the Apple II version being described as "stand[ing] out far ahead of the pack".

In 1984, Irem developed an arcade conversion of Lode Runner. It contains 24 remixed levels from the 150 original levels. Irem brought many of its arcade-inspired levels to the Famicom Disk System with the names Super Lode Runner and Super Lode Runner II. In Japan, Game Machine listed Lode Runner on their August 1, 1984 issue as being the most successful table arcade cabinet of the month. The arcade version has numerous sequels, including these:

Lode Runner: The Bungeling Strikes Back (1984), selecting 30 levels based on the original game developed for the arcade. The gameplay is almost exactly the same (save the addition of a two-player mode) and the only major modification was the graphics and advancement to a 512-color palette. In Japan, Game Machine listed Lode Runner: The Bungeling Strikes Back on their March 1, 1985 issue as the seventh most successful table arcade unit of the month.