Total Annihilation
"Total Annihilation" was one of the first RTS games to feature radar that showed enemy units within its radius on the minimap. This added an additional element of electronic warfare to the game: players could construct radar jammers that prevented units in a small radius around them from appearing on radar. Mobile radar jammers could be used to create surprise attacks, necessitating the deployment of scout units on a regular basis to reveal said units visually. In addition, radar jammers could disguise the presence of visually cloaked units, such as the commander or land mines. Radar fields rendered cloaked units detectable; a radar jammer could make said units undetectable until the radar jammer was destroyed. "Total Annihilation" was also one of the first RTS games to point the way towards battlefields with hundreds and thousands of units. Previous games could field a hundred units or so. However, Total Annihilation initially permitted 250 units per side which was later patched to 500. A third party patch allowed up to 5,000 units per side.
Empire: Total War
"Empire: Total War" received "universal acclaim" according to the review aggregation website Metacritic. Reviewers praised the large scope of the game's strategy map "PC Gamer UK" noted that the game "takes a great deal of its design philosophy from the events and trends of its era", which enabled the game to reasonably reflect the challenges faced by the factions' historical counterparts. Praise was also given to the extensive number of factions, down to very small factions such as the Knights of St. John and a renegade pirate settlement. Kieron Gillen, reviewing for Eurogamer, described the campaign map as "endless" and due to the large amount of content, observed that he had managed to complete the entire campaign without even visiting the Indian theatre of play (approximately a full one fourth of the playable game world); a factor that enhanced the game's replayability. Other reviews echoed this sentiment; GameSpot stated that "even a short, 50-year campaign can take a good amount of time to complete, given that each turn requires strategic thinking on multiple fronts". Praise was further bestowed on the refined interface, introduction of a technology tree and level of strategic thinking required for the campaign map. However, some reviewers noted inconsistent behaviour with the campaign artificial intelligence; 1UP.com noted that it could perform illogical choices, such as "the occasional suicidal war between Dagestan and Russia", while "GamePro" was critical of the artificial intelligence in a number of areas, including the inability to mount a naval invasion or utilise effective strategies on the campaign map.