RTS
Real-time strategy games let you gather resources, build bases, create units and then tell the units to go and jump on the enemy. There is large amount of mouse clicks required to win.

Dune II: Battle for Arrakis
This was one of the first real-time strategy games. The game takes place on the planet Arrakis were three houses, Atreides, Ordos and Harkonnen are fighting for the control of the spice melange. To gather spice you send out your harvesters and then you use the spice to get money and build your base so you can destroy you enemy. Each house have their own weapons and tactics and building a defence tower inside the enemy base is always fun.


Warcraft: Orcs & Humans
The game that started the Blizzard empire. Ok RTS.


Command & Conquer
Real-time strategy game set in the modern world. I like Dune2/Warcraft 2 better.


Warcraft II: Tides of Darkness
Real-time strategy game that takes place in a fantasy world. You can play as the orc's or the humans that fight each other in the Second Great war. Like all real-time strategy games you need to collect resources, build you base and get troops so you can complete your objective each mission. The graphic is in a cartoon style with fun voices on the troops if you poke them to much with the mouse.


Command & Conquer: Red Alert
Still not that fun.


Warcraft II: Beyond the Dark Portal
Expansion to Warcraft II.


Warhammer: Dark Omen
Real-time strategy game in the Warhammer world. Take the role as commander Morgan and order your army around on the battlefield and slay the evil orcs and undead. Fun talk between the battles was also :).


StarCraft
Science fiction real-time strategy. Like Warcraft but rather then stealing the setting from Warhammer Fantasy Battle Blizzard stole it from Warhammer 40,000 :). Three species to play, the Terrans, the Zerg and the Protoss. Each side have it's own style of gameplay but there is to much micromanagement of all the units to be fun.