Sneaking into bases is just the best thing. There's the feeling of anticipation as you scan the perimeter of a hulking military installation, the satisfaction of stealth kills and security camera outages as you breach its walls and (of course) that feeling of utter terror when the alarm is triggered and identical men in red berets start sprinting in rough diagonals towards you.
Project IGI stood for 'I'm Going In' (which made it a shame that its sequel wasn't called 'I'm Just Popping Out: Does Anyone Want Anything?') and it saw Brit hero David Jones doing just that. He went in, he went out, and he shook bad guys all about - with bullets.
What separated IGI from fledgling Tom Clancy rivals back in 2001 was what it was built in. It was a first-person military shooter, yet it had been put together on the foundations of a flight sim. Norwegian outfit Innerloop had treated us to Joint Strike Fighter three years previously, but seemingly grew a taste for headshots and men who shout 'Hey you!'