Here is the full list of all 10 Explosive Dinosaurs achievements.
Play a game with 4 players
Play a 2VS2 set of minigames
Read the full credits without shooting at them
Shoot every name in the credits
Enable 300FPS in the options menu
Win every minigame in the minigame discovery mode
Win every minigame in the minigame discovery mode in HARD mode
Complete a Crazy Arcade mode run
Get all of the minigame's secret medals
Get all of the minigame's secret medals in HARD mode