1000-Hit Combo
When you first get the Flames of Ares, instead of clicking L3 and R3 like the game instructs, keep killing the enemies (they continuously respawn and you can easily earn red orbs in the process) by grappling them with R1 and slamming them with TRIANGLE. It's a bit time-consuming, but after awhile, you'll build up a crazy combo and even receive a trophy.
Easy "Can't Stop, Won't Stop. Badboy!" trophy
This requires a fully upgraded Magic Meter and upgraded Zeus' Lightning Blades and can be done under the Easy difficulty setting.
Progress through Chapter 25 "The Furnace" until you reach the area where you are stuck between two large bowls dumping flames. Enemies will begin to spawn here. Start with the Fires of Ares attack, execute combo, then switch to Zeus' Lightning Blades. Press L1 + R1 until the magic attack ends. Then, go back to Fires of Ares and execute L1 + Square attacks until you can switch back to Zeus' Lightning Blades again and use the magic attack. Repeat the process to reach a 1000 combo.
At the start of Chapter 19 "The Foot Of Apollo", get to the rock Kratos must push. Instead of pushing it, attack that location with the Blades of Zeus and execute the L1 + Square special attack to slowly build your combo to 1,000. Note: This will require some time.
At the very start of the game, when Kratos fights a single Satyr, use the kick attack against it. Try to push the Satyr into the corner. Keep it on its back with repeated kicks. Each kick slowly builds your combo, and will take quite some time to reach 1,000.
Rage Meter Trophy
When you are battling Alecto in her Kraken form, watch for the moment when you are first forced to strike a tentacle. A prompt to use the R1 grapple move will appear, but you can ignore it and use regular attacks on the tentacle instead. As you do, your rage meter will fill and then remain full, which makes it easy to earn the trophy that is awarded once you manage to keep your rage meter full for 2 minutes.
1000-Hit Combo...