Commandos: Behind Enemy Lines

The player assumes the role of an allied officer, who has been entrusted to command a group of commandos on twenty missions. A briefing given before a mission begins is divided into two parts - the first, focuses on the background of the mission and where it takes place, and the second, using the mission's map, details the objectives the commandos must complete, any important information they need to know, and what they must use to escape the area. Commandos features six commandos that the player can control, though each mission gives a specific subset of commandos that the player can use to complete objectives, though a mission is failed if any of the commandos are killed in action.

Each commando that the player gets to control has a different set of abilities and equipment that they can use to deal with enemies and help them complete their missions - the Green Beret is able to move barrels, climb rough surfaces, use a lure to distract enemies, and can kill soldiers with a knife; the Marine can dive underwater, use a harpoon gun, can kill enemies with a knife, and can pilot ships and boats; the Driver can drive vehicles and operate tanks and mounted guns, and is one of two commandos who can treat the injuries of his comrades; the Sapper is capable of using grenades and handling explosives, can cut through wire fences and set up traps; the Sniper can use a sniper rifle to take out targets, and the second commando who can treat his comrades injuries with a first aid kit; the Spy can wear enemy uniforms, distract soldiers when disguised as an officer, and can kill enemies with a lethal injection. In addition to their abilities, all commandos carry a handgun that they can use as a last resort to defend themselves. The game's emphasis is towards stealth and carefully planned tactics rather than gun battles, as the commandos will not survive for long if shot at.

According to Gonzalo Suarez of Pyro Studios, the game began development because he "saw that there were hardly any tactical action games being developed and [he] decided to make one". The soundtrack for the game was composed by David García-Morales.

The game was developed over approximately 18 months, according to lead programmer Jon Beltran de Heredia, with the final 12 months spent in full-time development at the studio in Madrid. The team that completed the project numbered around 18 people, and the source code amounted to approximately 250,000 lines of C++ and assembly language. Beltran de Heredia recalled that the main team spent extended periods working ten hours a day, seven days a week during the final stretch of production.

Commandos: Behind Enemy Lines received "favourable" reviews according to the review aggregation website GameRankings. Next Generation gave a high praise to the game, citing its graphics as "gorgeous", and its gameplay "tough" and "challenging".

The game was a significant and unexpected commercial success. Designer Gonzalo Suarez attributed its sales to word of mouth, as the game received little promotion and said that they were aiming to sell around 15,000 copies. In the German market, it spent 16 weeks at #1 on the computer game sales charts, taking the position from Anno 1602 and holding it through Media Control's rankings for the second halves of June, July and August 1998. The game's sales in German-speaking countries totaled 158,000 units by the end of September, which made it the region's second-best-selling computer game during the first nine months of 1998, behind Anno.