Just wondering if the GOG community can help me remember the titles of a couple of games I played way back in 2000/01

The first was a Vietnam helicopter action game, 3D in the style of SWiV 3D - although more in depth. Different types of choppers and various types of missions - kill, escort, recon etc

The second was an RTS, where the aim was to research the tech to build a rocket to leave the planet. Was only a bog standard example of the genre, but stand out features included environmental events eg asteroid strikes that would damage your units.

Appreciate these are vague, but hopefully you guys can help me remember what they were.

No if only I could remember where I left my pants...

Si

RTS about escaping earth makes me think
Earth 2150
http://www.mobygames.com/game/windows/earth-2150

or one of the games in that series, 2150 is the one that came out in 2000.

Ummmm, ChopLifter? :P

Seriously, Chimerical is VERY close. The rocket game is the sequel to Earth 2150 titled "Earth 2150: the Moon Project" or just "The Moon Project" depending on which box you got. It was supposed to be an expansion but they kept adding to it so made it it's own game. Great fun; still play it from time to time.