I thought Normal was decently challenging (never tried Easy I think). Classic games though... OUCH.[DOUBLEPOST=1380945616,1380945122][/DOUBLEPOST]Tips for success :
1. Never finish your turn without being on overwatch. Take your time.
2. Lead with Assault, let them carry the stunners. Lightning reflexes is king.
3. Snipers with shared vision is game breaking.
4. Research plasma when possible, their weapons are best in game.
5. Scopes on everyone not support or assault. When support hit major, scope them.
6. Armor is important.
7. Plan your base ahead, keep a 4 by 4 area on each side for satellite stuff and power generators.
8. Make sure to have a solid B team. Going in with 6 vets is nice but your rookies need some time too.
9. Get 6 man squad ASAP.
10. North America or Europe are great places to start.
11. Engineers are very important to get, scientists, not so much.
12. Plan your budget on how quickly you can get your satellite network up.
13. When you choose a place to defend in the beginning of the game, 2 places you won't choose on normal will get 2 panic. Think of reward/cost ahead of time.
14. My favorite squad is 1 Sniper, 1 Heavy, 2 Assault, 2 Support.
15. When enemies get discovered and run out range, don't go after them, get in cover and overwatch. Flank them while staying in cover. Partial cover sucks. Get full cover.