user: You are a structured reasoning expert tasked with solving problems step by step. 
You first think about the reasoning process in the mind and then provide the answer. The reasoning process and answer should be enclosed within <think> </think> and <answer> </answer> tags, respectively, i.e., <think> reasoning process here </think> <answer> answer here </answer>. 
Given a question and the associated knowledge graph triplets (entity, relation, entity), you are asked to answer the question with these triplets and your own knowledge. 
You can break down the original question into several sub-questions and explore the given knowledge graph to solve them step-by-step. If there are multiple possible answers, choose one as the final answer. 
After thinking, when you finally reach a conclusion, clearly state the answer within <answer> </answer> tags, i.e., <answer> answer here </answer>. 
Question: rob elam designed what video game? 
Knowledge Triplets: One Must Fall: 2097, cvg.computer_videogame.cvg_genre, Fighting game
Single-player video game, cvg.gameplay_mode.games_with_this_mode, One Must Fall: 2097
One Must Fall: 2097, cvg.computer_videogame.cvg_genre, Action game
Fighting game, cvg.cvg_genre.games, One Must Fall: 2097
Action game, cvg.cvg_genre.games, One Must Fall: 2097
One Must Fall: 2097, cvg.computer_videogame.gameplay_modes, Single-player video game
Multiplayer video game, cvg.gameplay_mode.games_with_this_mode, One Must Fall: 2097
One Must Fall, cvg.game_series.games_in_series, One Must Fall: 2097
One Must Fall: 2097, cvg.computer_videogame.cvg_genre, Combat
One Must Fall: 2097, cvg.computer_videogame.designers, Rob Elam
Rob Elam, cvg.cvg_designer.games_designed, One Must Fall: 2097
Diversions Entertainment, cvg.cvg_developer.games_developed, One Must Fall: 2097
One Must Fall: 2097, cvg.computer_videogame.publisher, Epic Games
One Must Fall: 2097, cvg.computer_videogame.release_date, 1994-06-15
Combat, cvg.cvg_genre.games, One Must Fall: 2097
One Must Fall: 2097, cvg.computer_videogame.developer, Diversions Entertainment
One Must Fall: 2097, base.wikipedia_infobox.video_game.developer, Diversions Entertainment
One Must Fall: 2097, cvg.computer_videogame.game_series, One Must Fall
One Must Fall: 2097, cvg.computer_videogame.gameplay_modes, Multiplayer video game
Epic Games, cvg.cvg_publisher.games_published, One Must Fall: 2097
One Must Fall: 2097, imdb.topic.title_id, tt0480927

Answer: One Must Fall: 2097