For anyone over 30, this game is essential ownership. Who could resist buying this classic under $10? And with a heap of mods? Not me, at any rate. And what a treat, just stepping through the first few stages was like a step back in time, and I have to say, that gut wrenching feeling of walking around the corner and hearing "Get him!" is still there. The level design, music, controls, all just timeless. The fact of what makes the game still so appealing is the simplicity of the game itself. Hunt them down, clear the levels. Yes this is a legacy of its tech era, but not having constant distractions or side-quests coming up, you can lose hours on this game and it still feels like minutes. The weapon selection is simple and straightforward, but man, it's still so much fun to fire that double-barrel shotgun. The movement and animation is still fluid, the controls are minimal but effective. Strafing and shooting just work brilliantly as they ever did. The puzzles are still challenging, and the AI, now some 20+ years old is still hard-as-nails to beat especially on the higher levels. Can't wait to break out some multiplayer action. (A side note: to get this working on Windows 10, I had to load the Yamagi client. Once I did that, the full screen sizing worked properly with 1920x1080 resolution and the mouse worked.)